Sen. Bernie SandersBernard (Bernie) SandersTrump has declared war on our climate — we won’t let him win Stock slide bites boastful Trump, but rising wages great for GOP Millions should march on DC to defeat Trump Republicans MORE (I-Vt.) says attacks against former President Bill ClintonWilliam (Bill) Jefferson ClintonLongtime Clinton confidant blames Comey for 2016 loss Trump’s national monument rollbacks take effect A year after Obama, Dems still looking for replacement MORE’s sexual history are not fair game for politicians looking to defeat his wife and Democratic primary front-runner Hillary ClintonHillary Diane Rodham ClintonTrump touts report Warner attempted to talk to dossier author Poll: Nearly half of Iowans wouldn’t vote for Trump in 2020 Rubio on Warner contact with Russian lobbyist: It’s ‘had zero impact on our work’ 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.