Clinton and Trump have a near-encounter in a battle for Ohio

The Cleveland Airport offered a glimpse of how critical the fight for Ohio has become in the lead-up to the general election, as airplanes for both party nominees and their running mates were parked on the tarmac Monday morning.

Trump and Pence attended a round-table discussion with union members, where Trump warned that America's manufacturing jobs are "going to hell."

Trump was also expected to campaign at a fair in Youngstown, Ohio, in a nod to the state's role as a make-or-break proving ground for Republican presidential candidates.

No Republican has won the White House without winning Ohio and Trump is trying to overcome some splintering in the state party, which was supportive of Ohio Gov. John Kasich during the presidential primary.

Clinton has questioned Trump's temperament and preparation to serve as commander in chief while seeking to connect the reality television star to the extreme "alt-right" movement within the Republican Party.

Trump visited a predominantly black church in Detroit on Saturday in a rare appearance with minority voters, aiming to counter Clinton's argument to moderate and suburban voters that he has allowed a racist fringe to influence his candidacy.