Voters head to the polls today to choose GOP delegates in three contests, two of which may define the Republicans' presidential race.

Primaries are being held today in Florida, Ohio and the Northern Mariana islands.

Fox News' Sarah Chamberlain spoke with Rob and Bernie on KPEL this morning about the stakes of today's primaries.

Chamberlain said if Ohio Governor John Kasich wins Ohio, the GOP can prepare for a brokered convention in Cleveland.