FILE - In this June 4, 2013, file photo Sen. Claire McCaskill, D-Mo., speaks on Capitol Hill in Washington during a Senate Armed Services Committee hearing on legislation regarding sexu

 

              FILE - In this June 4, 2013, file photo Sen. Claire McCaskill, D-Mo., speaks on Capitol Hill in Washington during a Senate Armed Services Committee hearing on legislation regarding sexu
FILE - In this June 4, 2013, file photo Sen. Claire McCaskill, D-Mo., speaks on Capitol Hill in Washington during a Senate Armed Services Committee hearing on legislation regarding sexual assaults in the military. McCaskill, who has long been a vocal advocate for sexual assault victims, is perplexed after being singled out in ads by advocacy group Protect Our Defenders over her opposition to an amendment proposed by Sen. Kirsten Gillibrand, D-N.Y. Gillibrand believes she has support of 41 other senators, but she needs 51. McCaskill is not among them because she instead favors reforms suggested by the Republican-led House Armed Services military personnel subcommittee. (AP Photo/Susan Walsh, File)