As Senate Democrats set about strengthening their majority, a potential concern would be a retirement by Joe Biden, who is currently running for President. While Biden is widely seen as being at the back of the Presidential pack, he would nevertheless be heavily favored for a seventh term if he runs for re-election next year — but a retirement could result in a win by Republican Congressman Mike Castle. However, Roll Call quotes Biden spokeswoman Elizabeth Alexander, who said that Biden has no plans to retire: "While Sen. Biden has presently suspended his campaign activities for the Senate due to legal requirements set by the Federal Election Commission, Sen. Biden intends to run for re-election in Delaware."