Vice President Joe Biden Joe BidenSenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE is slamming Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE’s now-infamous taco tweet, saying the presumptive GOP nominee needs to get serious about what he would do if elected president.

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“He is a smarter guy that this,” Biden told Fox 5 DC on Friday.

“I hope he reaches the point where he figures out that it’s not a game show, and that he begins to talk in earnest about where he would take the country were he to win because that’s the kind of debate the public deserves," Biden added.

"I know Hillary [Clinton] or Bernie [Sanders], if he is the nominee, will do that. But the American public deserves genuine debate at this moment in our history on the direction of the country — whether we continue the direction we are on and moving forward or are we making a significant change. I’m not sure he knows.”

Trump created a social media stir when he tweeted a photo of himself eating a taco bowl Thursday with a caption that read “Happy Cinco de Mayo! The best taco bowls are made in Trump Tower Grill. I love Hispanics!”

President Obama on Friday declined to comment on Trump’s tweet.

“I have no thoughts on Mr. Trump’s tweets,” Obama said, with a laugh. “As a general rule, I don’t pay attention to Mr. Trump’s tweets. That will be true for the next six months, so you can just file that one.”