PITTSBURGH (KDKA) — On Monday, three presidential candidates will all be campaigning just over the Pennsylvania-Ohio line. Donald Trump, Ohio Gov. John Kasich and Sen. Bernie Sanders will all be stopping in Youngstown.

There are 66 Republican delegates at stake in Ohio. The race is so close that Donald Trump has cancelled a Monday appearance in Florida to come to Youngstown.

Kasich is scheduled for a 10 a.m. event in Youngstown, while Trump’s rally is at 6 p.m. Trump arrives under heightened security, and growing pressure for him to “control” his supporters.

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“They want me to tell my people to be nice. Please be nice. My people are nice,” Trump said.

Trump has suggested that some of the protestors outside his rallies are actually supporters of Sanders, a charge he has denied.

“To suggest that our campaign is telling people to disrupt his campaign is a lie,” Sanders said.

He will get a chance to tell Ohio voters about this directly, when he takes center stage also in Youngstown tomorrow at 11 a.m. It’s a campaign stop that comes on the heels of Hillary Clinton showing up in Youngstown last night.

“We need to be doing everything we can to support public education and make it stronger for our children,” the former Secretary of State said.