Republicans favor Kentucky Sen. Rand Paul and former Secretary of State Condoleezza Rice as their 2016 presidential nominees, according to a new poll that vaults the Bush-era diplomat to the top of the pack.

The weekly Economist/YouGov poll found that both won 13 percent of GOP support. Rep. Paul Ryan, the 2012 vice presidential nominee, was second at 10 percent, followed closely by New Jersey Gov. Chris Christie and Florida Sen. Marco Rubio at 9 percent and former Florida Gov. Jeb Bush at 8 percent.

Rice's surge is something of a surprise, but it shows how wide open the 2016 GOP race is. She is a CBS News consultant on foreign policy and recently became one of the first women allowed to join Augusta National Golf Club, home of golf's Masters tournament.

While Rice remains popular among Republicans, when Democrats and independents were added to the polling sample of 1,000 Americans age 18 and older, support for her dropped to 8 percent . But that was good enough for a tie with Paul for second place behind Christie, who weighed in at 13 percent. Among Democrats, Christie received 17 percent support and Rise was second at 6 percent.