Sen. Bernie SandersBernie SandersNRA head: Sanders 'a political predator' What would Bernie say to Wall Street for 0K? Sanders warns of possible nuclear war with North Korea MORE (I-Vt.) says attacks against former President Bill ClintonBill ClintonLarry Summers: Mnuchin squandering his credibility with Trump tax proposal Patagonia threatens to sue Trump over national monuments order Robert Siegel leaving NPR's 'All Things Considered' MORE’s sexual history are not fair game for politicians looking to defeat his wife and Democratic primary front-runner Hillary ClintonHillary Rodham ClintonTrump in campaign mode at NRA convention Vicente Fox to Trump: ‘Being president ain’t easy’ When political opportunity knocked, Jason Chaffetz never failed to cash in MORE.

“I think, you know, we have enormous problems facing this country, and I think we got more things to worry about than Bill Clinton’s sexual life,” Sanders said Sunday on ABC’s “This Week.”

Republican primary front-runner Donald Trump has recently made the sexual allegations against Clinton an issue in the White House race.

Sanders said Trump would be better off focusing on serious issues facing the nation, like climate change.

“I think – interestingly enough, maybe Donald Trump might want to focus attention on climate change, understand that climate change is not a hoax, as he believes that it is, that maybe Donald Trump should understand that we should raise the minimum wage in this country, which he opposes, and maybe we should not be giving huge tax breaks to fellow billionaires like Donald Trump,” he said. 

The former president has denied the allegations of assault and harassment, as well as accusations of infidelity.

Sanders previously came to Hillary Clinton’s defense at the first Democratic primary debate, when he said the American people were “sick and tired” of hearing about the FBI investigation into her private email server.