Similarly, the Democratic caucus offered a mild rebuke of Sen. Joe Lieberman (I-Conn.) for his endorsement of Sen. John McCain (R-Ariz.) in the 2008 presidential election.
Lieberman took the extraordinary step of speaking in support of McCain - one of his closest friends - at the 2008 Republican National Convention.
Despite that, Senate Democrats agreed to a deal brokered by Majority Leader Harry Reid (Nev.), under which Lieberman gave up a seat on the Environment and Public Works Committee but held onto his gavel of the Homeland Security and Governmental Affairs Committee. At the time, one Democratic Senator called that arrangement "basically a plea bargain."
Former Sen. Scott Brown, R-Mass., candidate for U.S. Senate in New Hampshire, holds his hand over his heart during the singing of the national anthem as he waits to take the stage for his town hall campaign rally with Sen. John McCain at the Pinkerton Academy in Derry, N.H., on Monday, Aug. 18, 2014.