Donald Trump is stepping up his rhetoric suggesting the November general election will be “rigged” by Hillary Clinton’s campaign, launching an initiative on Friday night to recruit “election observers.”

“Help Me Stop Crooked Hillary From Rigging This Election!” reads the new page on his official campaign site, which solicits supporters’ contact information before asking for donations.

After signing up, supporters receive an email promising a campaign staffer will contact them shortly.

“We are going to do everything we are legally allowed to do to stop crooked Hillary from rigging this election,” the confirmation email reads.

While Trump was long suggested he’s a victim of a “rigged system,” he recently started suggesting the only way he could lose the general election is if anti-Trump forces intervene to unlawfully sway the results.

The GOP nominee told a crowd last night in Pennsylvania that Clinton would only win the state “if the cheating goes on.”

“We’re going to watch Pennsylvania,” Trump reportedly said. “Go down to certain areas to watch and study and make sure other people don’t come in and vote five times.”

This post has been updated.