For GOP, runoffs could complicate key Senate races
Republicans aiming to win control of the Senate in the 2014 elections may be forced to confront runoffs in key states this summer that could expose intraparty rifts and allow small numbers of voters to pick the nominees.
In North Carolina, Republican Thom Tillis hopes to capture at least 40 percent of the vote in the May 6 primary to avoid a mid-July runoff. Republicans hope to topple Democratic Sen. Kay Hagan this year.
In Georgia, a large field of Republicans makes a runoff election likely, potentially helping Democrat Michelle Nunn.
And in Iowa, the winner of a crowded GOP Senate primary will need to capture 35 percent of the vote to avoid a state GOP convention, a process that often favors the most conservative candidate.