FILE - In this Thursday, Sept. 16, 2010, file photo, Delaware Democratic Senate candidate Chris Coons waves after being introduced during a candidate forum, in Wilmington, Del. On the national level, U.S. Sen. Chris Coons is facing a Democratic primary challenge from progressive newcomer Jessica Scarane, who believes Coons' desire for bipartisanship has made him too willing to compromise with Republicans. (AP Photo/Rob Carr, File)