Donald Trump's campaign is seeking to recruit "election observers" following the Republican nominee's repeated claims that the general election is "rigged."

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."

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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."

“She can’t beat what’s happening here. The only way they can beat it in my opinion, and I mean this 100 percent, if in certain sections of the state they cheat,” Trump said of Clinton campaign in Pennsylvania.

Although laws vary from state to state, campaigning by political parties is typically banned at polling sites under voter intimidation laws.