U.S. Senate runoff in Arkansas
Blanche Lincoln is hoping to avoid becoming the third sitting senator to lose an intraparty fight this year, but even her closest allies acknowledge that her Democratic runoff race against Lt. Gov. Bill Halter is a tossup.
Three weeks ago, Lincoln got 44.5 percent of the vote to Halter's 42.5 percent in the Democratic primary. A third candidate in that race, conservative D.C. Morrison, won 13 percent, forcing Lincoln and Halter into Tuesday's runoff.
Much like the primary, the runoff has pitted Lincoln and her supporters within the Democratic establishment -- former president Bill Clinton has campaigned for her and she has been endorsed by President Obama -- against organized labor, which has dumped millions of dollars into ads and voter identification programs on Halter's behalf.