Question: Who is the Democratic senator for Senate from the state that Arlen Specter left at the 111th Congress of the United States ?

text: 111th United States Congress
Changes in membership -- Senate
Funeral service for Senator Robert Byrd , who died June 28 , 2010 . He was the longest-serving senator and the longest-serving member in the history of Congress . [ 35 ] [ 36 ] Four of the changes are associated with the 2008 presidential election and appointments to the Obama Administration , one senator changed parties , one election was disputed , two senators died , one senator resigned , and three appointed senators served only until special elections were held during this Congress . See also : List of special elections to the United States Senate
The One Hundred Eleventh United States Congress was a meeting of the legislative branch of the United States federal government from January 3, 2009, until January 3, 2011. It began during the last two weeks of the George W. Bush administration, with the remainder spanning the first two years of Barack Obama's presidency. It was composed of the Senate and the House of Representatives. The apportionment of seats in the House was based on the 2000 U.S. Census. In the November 2008 elections, the Democratic Party increased its majorities in both chambers, giving President Obama a Democratic majority in the legislature for the first two years of his presidency. A new delegate seat was created for the Northern Mariana Islands. The 111th Congress had the most experienced members in history: at the start of the 111th Congress, the average member of the House had served 10.3 years, while the average Senator had served 13.4 years.
State ( class ) Vacator Reason for change Successor Date of successor 's formal installation
Minnesota ( 2 ) Disputed Incumbent Norm Coleman ( R ) challenged the election of Al Franken ( D ) . The results were disputed , and the seat remained vacant at the beginning of the Congress . Following recounts and litigation , Coleman conceded , and Franken was seated Al Franken ( D ) July 7 , 2009
Illinois ( 3 ) Vacant Barack Obama ( D ) resigned near the end of the previous Congress , after being elected President of the United States . His successor was appointed December 31 , 2008 , during the last Congress , but due to a credentials challenge , his credentials were not deemed in order until January 12 , and he was not sworn in to fill his seat until 12 days after the initiation of this Congress . The appointed successor filled the seat until a special election was held November 2 , 2010 Roland Burris ( D ) January 12 , 2009
Delaware ( 2 ) Joe Biden ( D ) Resigned January 15 , 2009 , to assume the position of Vice President . The appointed successor held the seat until a special election was held November 2 , 2010 Ted Kaufman ( D ) January 16 , 2009
Colorado ( 3 ) Ken Salazar ( D ) Resigned January 20 , 2009 , to become Secretary of the Interior . The appointed successor held the seat for the remainder of the term that ends with this Congress Michael Bennet ( D ) January 21 , 2009
New York ( 1 ) Hillary Clinton ( D ) Resigned January 21 , 2009 , to become Secretary of State . The appointed successor held the seat until a special election was held November 2 , 2010 Kirsten Gillibrand ( D ) January 26 , 2009
Pennsylvania ( 3 ) Arlen Specter ( R ) Changed party affiliation April 30 , 2009 Arlen Specter ( D ) April 30 , 2009
Massachusetts ( 1 ) Ted Kennedy ( D ) Died August 25 , 2009 . The appointed successor held the seat until the elected successor took the seat Paul G. Kirk ( D ) September 25 , 2009
Florida ( 3 ) Mel Martinez ( R ) Resigned September 9 , 2009 , for personal reasons . The appointed successor held the seat for the remainder of the term that ends with this Congress George LeMieux ( R ) September 10 , 2009
Massachusetts ( 1 ) Paul G. Kirk ( D ) Appointment expired February 4 , 2010 , following a special election . The winner of the election held the seat for the remainder of the term that ended January 3 , 2013 Scott Brown ( R ) February 4 , 2010
West Virginia ( 1 ) Robert Byrd ( D ) Died June 28 , 2010 . The appointed successor held the seat until a special election was held November 2 , 2010 Carte Goodwin ( D ) July 16 , 2010
Delaware ( 2 ) Ted Kaufman ( D ) Appointed January 15 , 2009 . The appointment lasted only until the November 2010 special election , in which he was not a candidate . The winner of the special election held the seat for the remainder of the term that ended January 3 , 2015 Chris Coons ( D ) November 15 , 2010
West Virginia ( 1 ) Carte Goodwin ( D ) Appointed July 16 , 2010 . The appointment lasted only until the November 2010 special election , in which he was not a candidate . The winner of the special election held the seat for the remainder of the term that ended January 3 , 2013 Joe Manchin ( D ) November 15 , 2010
Illinois ( 3 ) Roland Burris ( D ) Appointed January 12 , 2009 . The appointment lasted only until the November 2010 special election , in which he was not a candidate . The winner of the special election held the seat for the remainder of the term that ended with this Congress Mark Kirk ( R ) November 29 , 2010