or front-run·ner, front·run·ner
Origin of front runner
Examples from the Web for front runner
In April, Wehby was the front-runner; now, she is trailing badly and Oregon is safely in the D column.
But being a front-runner can be a curse as much as a blessing.What Hillary Clinton Can Learn From Portugal, Costa Rica, and England in the World Cup|Nathan Daschle|July 1, 2014|DAILY BEAST
Well, Senator Rand Paul last weekend won the straw poll at CPAC, so I guess that means he is now the 2016 front-runner.
And he's not going to register, I shouldn't think, as they front-runner in the polls.
Just look at Rubio, who was considered the front-runner for 2016 until he tried and failed to pass an immigration bill.Scott Walker Is the Perfect Republican Candidate for 2016 (on Paper)|David Freedlander|November 20, 2013|DAILY BEAST