As the list of candidates for the Republican nomination continues to grow, Marco Rubio, Mike Huckabee and Jeb Bush are top contenders: just under half of Republican voters now say they would consider voting for each.lthough most voters are not yet paying a lot of attention to the 2016 presidential campaign, most still think it's the right time for the campaign to get underway. Fifty-seven percent of Americans think this is about the right time to start the presidential campaign, while 41 percent think it's too soon.