A source tells 21 News that Donald Trump will be back in the Valley on Monday.

No details of the visit have been released, but since Monday's demolition derby at the Canfield Fair was canceled, there's speculation Trump will show up at the fair.

Still, Mahoning County Republican party chairman Mark Monroe says he does not know of any Trump visit to the fair.

Along with numerous stops throughout the state, the Valley has been a popular campaigning spot for both political parties.

Real Clear Politics says no Republican has ever won a presidential election without winning Ohio.

Some experts believe the final outcome of the presidential election could rest in the hands of Valley voters, where there was a dramatic crossover of Democrats voting for Trump in the March primary.

Trump stopped at the Youngstown-Warren regional Airport mid-March, and delivered a speech at Youngstown State University a little over two weeks ago.

Hillary Clinton held a rally at M7 Technologies in Youngstown before the March primaries.

She stopped in the city again at East High School after formally accepting the party's nomination at the Democratic National Convention at the end of July.

According to the most recent Emerson poll, Clinton and Republican challenger Donald Trump are tied in Ohio at 43 percent. Taking results from five different polls over the past month, Real Clear Politics averages Clinton's lead over Trump at 44.8 percent to 41 percent, an almost 4 point lead.