Steve Forbes: Trump will lure votes from Democrats
© Greg Nash

Publishing magnate Steve Forbes weighed in on the Republican presidential race Saturday and said that Trump would do well with unions, even if union leaders pull for a Democratic candidate.

“[Union leaders] may endorse a Democrat like Hillary ClintonHillary Diane Rodham ClintonKoch-backed group launches six-figure ad buy against Heitkamp Trump keeps up 'low IQ' attack on Maxine Waters GOP leaders to Trump: Leave Mueller alone MORE, but the rank and file, a big chunk of them are going to go their own way," Forbes said on a radio interview with John Catsimatidis. 

He also said a big part of Trump's appeal is his attitude in speeches. 

"Trump, even as he criticizes and throws out charges and all that kind of thing, he always ends up on an upbeat note about the USA," Forbes said.

"People want that, people want to hear that. They're tired of all this gloom and doom, and 'the U.S. is going in a trash heap.'"

When asked for his opinion on the rest of the GOP field, the Forbes Magazine founder added that Marco RubioMarco Antonio RubioRubio: McCabe 'should've been allowed to finish through the weekend' For Tillerson, bucking Trump became a job-killer At least six dead after pedestrian bridge collapses on cars in Florida MORE and Ted CruzRafael (Ted) Edward CruzCruz says Cambridge Analytica assured him its practices were legal Dem battling Cruz in Texas: ‘I can understand how people think this is crazy’ Overnight Tech: Facebook faces crisis over Cambridge Analytica data | Lawmakers demand answers | What to watch for next | Day one of AT&T's merger trial | Self-driving Uber car kills pedestrian MORE should seek to imitate Trump's rhetoric.

"Well Ted Cruz has got to get a, I think, more upbeat note. He's got some good ideas on gold, he's got some good ideas on taxes, but he's got to be a little more Reagan-esque in his speeches," he said.

"Rubio is trying to do that, he's getting better at it. I just wish he'd make his tax plan better, he's got the worst tax plan out there," Forbes added. "Better than what we have now, but not up to par with the other Republican candidates."