FILE - In this Nov. 3, 2012, file photo, Sen. Mark Udall, D-Colo., claps his hands as Vice President Joe Biden speaks during a campaign rally at Central High School in Pueblo, Colo. Thanks to the fiasco that followed the launch of President Barack Obama’s signature health care law, Democrats are now bracing for hard-fought Senate races in states they hoped to win with ease just two months ago. Weeks of technical problems with the health insurance enrollment website combined with anxiety over insurance cancellations for millions have erased early advantages enjoyed by Democratic candidates Gary Peters in Michigan and Udall in Colorado. (AP Photo/Matt Rourke, File)