Republicans must pick up six seats to win control of the upper chamber. But until recently, they have set their sights mostly on a handful of largely conservative or Southern states in which Democratic incumbents are backing the law, including Alaska, Arkansas, Michigan, North Carolina and Louisiana.
Now, several other solid opportunities -- including races in Colorado and New Hampshire -- have emerged to give Republicans an expanded map and a better chance of winning control of the Senate.
In Colorado, for example, the Republican National Committee is adding more than a dozen staffers as a new candidate and sagging poll numbers for Democrats raise GOP hopes of ending the party's decade-long drought on top-of-the-ticket wins in the state.
The additions come after Republicans got a top-tier recruit -- GOP Rep. Cory Gardner --- to challenge Democratic incumbent Sen. Mark Udall.
The RNC is hiring 11 new field workers, a director of Hispanic outreach and two additional Hispanic field staffers, as the GOP also contends for the governor’s seat. That will increase the party's national staff in the perennial political swing state to 20. The RNC will also open 12 field offices statewide, party officials said.
"Senator Udall and Governor (John) Hickenlooper are extremely vulnerable, and the RNC is making a serious investment across Colorado to defeat them in November," RNC spokesman Ryan Mahoney said.
Gardner shook up the state's politics late last month by announcing his bid. He is battling state Sen. Owen Hill for his party's nomination, but he has been many Republican donors and operatives' top choice in the race. Gardner declined to run last year, but he changed his mind as Udall barely edged possible challengers in a recent Quinnipiac University poll.
http://www.foxnews.com/politics/2014...-senate-races/