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Jeff Chiu, File, Associated Press
FILE - In this Jan. 23, 2015 file photo, former Florida Gov. Jeb Bush speaks in San Francisco. Jeb Bush and Mitt Romney are getting most of the attention in the early days of the Republican race for president. But as they court the party’s elite donors, some potential 2016 candidates who are to the right are just as eagerly chasing early support among evangelicals and social conservatives.

ATLANTA — Jeb Bush and Mitt Romney are courting the Republican Party's elite donors in the early maneuvering for the 2016 presidential race.

But several other potential Republican candidates are concentrating their efforts on Christian conservatives.

Louisiana Gov. Bobby Jindal hosted a prayer rally in his home state, where he called for a national spiritual revival.

Dr. Ben Carson, a retired neurosurgeon, spoke and attended services this weekend at a Houston megachurch conference billed as an effort to "restore the soul of America."

Several White House hopefuls also addressed social conservatives at the Freedom Summit in Iowa, which hosts the nation's first caucuses in 2016.

Republicans agree that religious conservatives still are an important voting bloc. The challenge for a GOP nominee is securing that support while reaching the wider electorate.