Even Democrats who reliably vote with their leadership, such as Sens. Mark Warner (Va.), Tim Kaine (Va.) and Debbie Stabenow (Mich.), on Wednesday said they were not certain they would support the assault weapons ban. Warner faces reelection in 2014. Kaine, who formerly headed the Democratic National Committee, was on Obama’s short list to be his running mate in 2008.

Vulnerable senators face lose-lose scenario on assault weapon vote – The Hill