or front-run·ner, front·run·ner
Origin of front runner
Examples from the Web for frontrunner
Thomas Sadoski should be the frontrunner to play every smarmy privileged thirty-something from now on.'The Newsroom' Ended As It Began: Weird, Controversial, and Noble|Kevin Fallon|December 15, 2014|DAILY BEAST
Rounds is still the frontrunner and has led in every poll so far.South Dakota's Bizarre Four-Way (Senate Election, That Is)|Ben Jacobs|October 15, 2014|DAILY BEAST
A Republican frontrunner for 2016 wants to work with dictators to stop the Islamic State.Rand Paul Wants to Team Up With Assad and Iran to Stop ISIS|Olivia Nuzzi|September 3, 2014|DAILY BEAST
Surprisingly, Jacobs, who was the frontrunner for much of the race, ended up in third place.
After all these years doing the show, have you gotten good at predicting who is going to be the frontrunner from the start?‘American Idol’ Bandleader Rickey Minor on His Favorite Performance and What It Takes to Win|Kevin Fallon|May 20, 2014|DAILY BEAST
British Dictionary definitions for frontrunner
Word Origin and History for frontrunner
also front-runner, of political candidates, 1908, American English, a metaphor from horse racing (where it is used by 1903 of a horse that runs best while in the lead).