Hillary Clinton will get a helping hand at a fundraiser in Omaha, Nebraska, Monday from deep-pocketed investor Warren Buffett — the third billionaire in less than a week to jump to the Democratic presidential nominee’s aid.

The two will hold a public rally together at Omaha North High Magnet School, where Clinton “will discuss her commitment to building an economy that works for everyone, not just those at the top,” according to the Clinton campaign.

Nebraska, a deeply Republican state, splits its electoral votes proportionally — and the Clinton campaign said it believes it can pick up the congressional district in which Buffett lives.

Mark Cuban, the reality TV show host and owner of the Dallas Mavericks, appeared with Clinton over the weekend in his hometown of Pittsburgh — and bashed the only billionaire in the presidential race, Donald Trump.

“Trump scares me,” Cuban told CNN. “Donald, initially, I really hoped he would be something different, that as a businessperson, I thought there was an opportunity there. But then he went off the reservation and went bats— crazy.”

And former New York City Mayor Michael Bloomberg came to Clinton’s defense at the Democratic National Convention last week in Philadelphia.

“I’m a New Yorker, and New Yorkers know a con when we see one,” Bloomberg said of Trump.