rank                senator        date of birth      entered senate         left senate    state served         party   time since entry
0      1             birch bayh    january 22 , 1928    january 3 , 1963    january 3 , 1981         indiana      democrat   51years , 29days
1      2          fred r harris   november 13 , 1930   november 4 , 1964    january 3 , 1973        oklahoma      democrat   49years , 89days
2      3         walter mondale     january 5 , 1928  december 30 , 1964  december 30 , 1976       minnesota      democrat   49years , 33days
3      4         joseph tydings         may 4 , 1928    january 3 , 1965    january 3 , 1971        maryland      democrat   49years , 29days
4      5       robert p griffin    november 6 , 1923       may 11 , 1966    january 2 , 1979        michigan    republican  47years , 266days
5      6        ernest hollings     january 1 , 1922   november 9 , 1966    january 3 , 2005  south carolina      democrat   47years , 84days
6      7           howard baker   november 15 , 1925    january 3 , 1967    january 3 , 1985       tennessee    republican   47years , 29days
7      7          edward brooke    october 26 , 1919    january 3 , 1967    january 3 , 1979   massachusetts    republican   47years , 29days
8      9            marlow cook       july 27 , 1926  december 17 , 1968  december 27 , 1974        kentucky    republican   45years , 46days
9     10               bob dole       july 22 , 1923    january 3 , 1969       june 1 , 1996          kansas    republican   45years , 29days
10    10            mike gravel        may 13 , 1930    january 3 , 1969    january 3 , 1981          alaska      democrat   45years , 29days
11    10           bob packwood  september 11 , 1932    january 3 , 1969    october 1 , 1995          oregon    republican   45years , 29days
12    10      richard schweiker        june 1 , 1926    january 3 , 1969    january 3 , 1981    pennsylvania    republican   45years , 29days
13    14    adlai stevenson iii    october 10 , 1930  november 17 , 1970    january 3 , 1981        illinois      democrat   43years , 76days
14    15          john v tunney       june 26 , 1934    january 2 , 1971    january 1 , 1977      california      democrat   43years , 30days
15    16             bill brock   november 23 , 1930    january 3 , 1971    january 3 , 1977       tennessee    republican   43years , 29days
16    16        james l buckley       march 9 , 1923    january 3 , 1971    january 3 , 1977        new york  conservative   43years , 29days
17    16  lowell p weicker , jr        may 16 , 1931    january 3 , 1971    january 3 , 1989     connecticut    republican   43years , 29days
18    19       david h gambrell   december 20 , 1929   february 1 , 1971   november 8 , 1972         georgia      democrat    43years , 0days
19    20       elaine s edwards       march 8 , 1929     august 1 , 1972  november 13 , 1972       louisiana      democrat  41years , 184days
20    21               sam nunn   september 8 , 1938   november 8 , 1972    january 3 , 1997         georgia      democrat   41years , 85days
21    22    bennett johnston jr       june 10 , 1932  november 13 , 1972    january 3 , 1997       louisiana      democrat   41years , 80days
22    23         james abourezk   february 24 , 1931    january 3 , 1973    january 3 , 1979    south dakota      democrat   41years , 29days
23    23              joe biden   november 20 , 1942    january 3 , 1973   january 15 , 2009        delaware      democrat   41years , 29days
24    23             dick clark  september 14 , 1928    january 3 , 1973    january 3 , 1979            iowa      democrat   41years , 29days
25    23          pete domenici         may 7 , 1932    january 3 , 1973    january 3 , 2009      new mexico    republican   41years , 29days
26    23      walter huddleston      april 15 , 1926    january 3 , 1973    january 3 , 1985        kentucky      democrat   41years , 29days
27    28            paul laxalt      august 2 , 1922  december 18 , 1974    january 3 , 1987          nevada    republican   39years , 45days
28    29             john glenn       july 18 , 1921  december 24 , 1974    january 3 , 1999            ohio      democrat   39years , 39days

Table as JSON:
{"rank":{"0":1,"1":2,"2":3,"3":4,"4":5,"5":6,"6":7,"7":7,"8":9,"9":10,"10":10,"11":10,"12":10,"13":14,"14":15,"15":16,"16":16,"17":16,"18":19,"19":20,"20":21,"21":22,"22":23,"23":23,"24":23,"25":23,"26":23,"27":28,"28":29},"senator":{"0":"birch bayh","1":"fred r harris","2":"walter mondale","3":"joseph tydings","4":"robert p griffin","5":"ernest hollings","6":"howard baker","7":"edward brooke","8":"marlow cook","9":"bob dole","10":"mike gravel","11":"bob packwood","12":"richard schweiker","13":"adlai stevenson iii","14":"john v tunney","15":"bill brock","16":"james l buckley","17":"lowell p weicker , jr","18":"david h gambrell","19":"elaine s edwards","20":"sam nunn","21":"bennett johnston jr","22":"james abourezk","23":"joe biden","24":"dick clark","25":"pete domenici","26":"walter huddleston","27":"paul laxalt","28":"john glenn"},"date of birth":{"0":"january 22 , 1928","1":"november 13 , 1930","2":"january 5 , 1928","3":"may 4 , 1928","4":"november 6 , 1923","5":"january 1 , 1922","6":"november 15 , 1925","7":"october 26 , 1919","8":"july 27 , 1926","9":"july 22 , 1923","10":"may 13 , 1930","11":"september 11 , 1932","12":"june 1 , 1926","13":"october 10 , 1930","14":"june 26 , 1934","15":"november 23 , 1930","16":"march 9 , 1923","17":"may 16 , 1931","18":"december 20 , 1929","19":"march 8 , 1929","20":"september 8 , 1938","21":"june 10 , 1932","22":"february 24 , 1931","23":"november 20 , 1942","24":"september 14 , 1928","25":"may 7 , 1932","26":"april 15 , 1926","27":"august 2 , 1922","28":"july 18 , 1921"},"entered senate":{"0":"january 3 , 1963","1":"november 4 , 1964","2":"december 30 , 1964","3":"january 3 , 1965","4":"may 11 , 1966","5":"november 9 , 1966","6":"january 3 , 1967","7":"january 3 , 1967","8":"december 17 , 1968","9":"january 3 , 1969","10":"january 3 , 1969","11":"january 3 , 1969","12":"january 3 , 1969","13":"november 17 , 1970","14":"january 2 , 1971","15":"january 3 , 1971","16":"january 3 , 1971","17":"january 3 , 1971","18":"february 1 , 1971","19":"august 1 , 1972","20":"november 8 , 1972","21":"november 13 , 1972","22":"january 3 , 1973","23":"january 3 , 1973","24":"january 3 , 1973","25":"january 3 , 1973","26":"january 3 , 1973","27":"december 18 , 1974","28":"december 24 , 1974"},"left senate":{"0":"january 3 , 1981","1":"january 3 , 1973","2":"december 30 , 1976","3":"january 3 , 1971","4":"january 2 , 1979","5":"january 3 , 2005","6":"january 3 , 1985","7":"january 3 , 1979","8":"december 27 , 1974","9":"june 1 , 1996","10":"january 3 , 1981","11":"october 1 , 1995","12":"january 3 , 1981","13":"january 3 , 1981","14":"january 1 , 1977","15":"january 3 , 1977","16":"january 3 , 1977","17":"january 3 , 1989","18":"november 8 , 1972","19":"november 13 , 1972","20":"january 3 , 1997","21":"january 3 , 1997","22":"january 3 , 1979","23":"january 15 , 2009","24":"january 3 , 1979","25":"january 3 , 2009","26":"january 3 , 1985","27":"january 3 , 1987","28":"january 3 , 1999"},"state served":{"0":"indiana","1":"oklahoma","2":"minnesota","3":"maryland","4":"michigan","5":"south carolina","6":"tennessee","7":"massachusetts","8":"kentucky","9":"kansas","10":"alaska","11":"oregon","12":"pennsylvania","13":"illinois","14":"california","15":"tennessee","16":"new york","17":"connecticut","18":"georgia","19":"louisiana","20":"georgia","21":"louisiana","22":"south dakota","23":"delaware","24":"iowa","25":"new mexico","26":"kentucky","27":"nevada","28":"ohio"},"party":{"0":"democrat","1":"democrat","2":"democrat","3":"democrat","4":"republican","5":"democrat","6":"republican","7":"republican","8":"republican","9":"republican","10":"democrat","11":"republican","12":"republican","13":"democrat","14":"democrat","15":"republican","16":"conservative","17":"republican","18":"democrat","19":"democrat","20":"democrat","21":"democrat","22":"democrat","23":"democrat","24":"democrat","25":"republican","26":"democrat","27":"republican","28":"democrat"},"time since entry":{"0":"51years , 29days","1":"49years , 89days","2":"49years , 33days","3":"49years , 29days","4":"47years , 266days","5":"47years , 84days","6":"47years , 29days","7":"47years , 29days","8":"45years , 46days","9":"45years , 29days","10":"45years , 29days","11":"45years , 29days","12":"45years , 29days","13":"43years , 76days","14":"43years , 30days","15":"43years , 29days","16":"43years , 29days","17":"43years , 29days","18":"43years , 0days","19":"41years , 184days","20":"41years , 85days","21":"41years , 80days","22":"41years , 29days","23":"41years , 29days","24":"41years , 29days","25":"41years , 29days","26":"41years , 29days","27":"39years , 45days","28":"39years , 39days"}}