In a move that's unprecedented in a presidential election, the campaign late this week launched a page on its website proclaiming, "Help Me Stop Crooked Hillary From Rigging This Election! Please fill out this form to receive more information about becoming a volunteer Trump Election Observer."

Those who wish to be a Trump "observer" are asked to fill out information on the website that should match their voter registration. Once submitted, voters are directed to a donation page.

Hours before the site gained traction Friday night, Trump said at a rally in Altoona, Pennsylvania, that the only way he would lose in Pennsylvania is "if cheating goes on."