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Libertarian presidential nominee Gary JohnsonGary Earl JohnsonBiden broadened Democratic base, cut into Trump coalition: study New Mexico lawmakers send recreational marijuana bills to governor Judge throws out murder convictions, releases men jailed for 24 years MORE on Friday acknowledged his donations to charity are "almost nonexistent.”
"My charitable contributions would be negligible — I mean just, really almost nonexistent," the former New Mexico governor told CNN, stressing that his wealth "does not even approach Hillary ClintonHillary Diane Rodham ClintonDemocrats worry negative images are defining White House Heller won't say if Biden won election Whitmer trailing GOP challenger by 6 points in Michigan governor race: poll MORE's."
"For me, giving to charity, I've always viewed that the things that I do in my life contribute to making lives better. That what I've done."
Earlier Friday, Clinton released her 2015 tax returns, which showed she and husband Bill ClintonWilliam (Bill) Jefferson ClintonFive takeaways from Arizona's audit results Virginia governor's race enters new phase as early voting begins Business coalition aims to provide jobs to Afghan refugees MORE donated about 10 percent of their income to charity and paid a tax rate of 30.6 percent.
Gary Johnson estimated his effective tax rate to be around 20 percent.
Johnson also said he does not expect 2012 Republican presidential nominee Mitt Romney to endorse him "for all sorts of reasons."
"I'm not expecting it," he said. "So given my expectations, everything's a bonus."
Romney has made clear he won’t support Donald TrumpDonald TrumpGraham says he hopes that Trump runs again Trump says Stacey Abrams 'might be better than existing governor' Kemp Executive privilege fight poses hurdles for Trump MORE, the GOP’s nominee.
Johnson has been aiming to get on the debate stage by getting a minimum of 15 points in the national polls by September. He has been polling at around 8 percent of late.