Table:
text: Earliest serving United States Senator
Earliest serving Senators currently living
Earliest serving Senators currently living
Rank_ Senator Date_of_birth Entered_Senate Left_Senate State_served Party Time_since_entry
1 Birch Bayh January 22, 1928 January 3, 1963 January 3, 1981 Indiana Democrat 51years, 29days
2 Fred R. Harris November 13, 1930 November 4, 1964 January 3, 1973 Oklahoma Democrat 49years, 89days
3 Walter Mondale January 5, 1928 December 30, 1964 December 30, 1976 Minnesota Democrat 49years, 33days
4 Joseph Tydings May 4, 1928 January 3, 1965 January 3, 1971 Maryland Democrat 49years, 29days
5 Robert P. Griffin November 6, 1923 May 11, 1966 January 2, 1979 Michigan Republican 47years, 266days
6 Ernest Hollings January 1, 1922 November 9, 1966 January 3, 2005 South Carolina Democrat 47years, 84days

Question: List the states that have a 49 year 29 day entry period for the earliest serving United States Senator?

Question: On what date did Congressman Joseph Tydings step in to take his seat in the United States' oldest serving Senator?