These races will decide whether the Senate follows the House in going Republican this fall.

Democratic seats in play:

1. For the second time in as many weeks, a top House handicapper is predicting the possibility that Republicans will regain the majority even as a new Washington Post/ABC News poll points to a deteriorating national political environment for Democrats. Stu Rothenberg, editor of the Rothenberg Political Report, upped his prediction of Republican gains to 37 to 42 seats -- right on the cusp of the ...

Is the race for U.S. Senate about the future of the country, or the future of Kentucky? The answer depends on which candidate you ask.

Rand Paul, a tea party-backed Republican running for a U.S. Senate seat in Kentucky, is leading his Democratic rival Jack Conway by 15 points, according to a new poll by SurveyUSA.