Vice President Joe Biden went into attack mode today, slamming Republican presidential presumptive nominee Donald Trump for previously suggesting that American wages are too high.

“All this stuff coming from Trump, you know, ‘American workers are getting paid too much?’ Where the hell does he live?” Biden exclaimed. “Well, I know where he lives, but I'm serious, think about it.”

The attack seemed to reference comments from Trump during a Fox News debate on Nov. 11, 2015.

“Taxes too high, wages too high. We’re not going to be able to compete against the world,” Trump said last fall. “I hate to say it, but we have to leave it the way it is.”

Trump has since walked back the comment, even suggesting now that the minimum wage should be increased.

Biden was speaking to reporters in Columbus, Ohio, after delivering remarks at an event to explain the Obama administration’s new change to overtime rules.

“We're in a situation where we have the greatest research universities in the world, the most agile venture capitalists in the world,” Biden said. “This is time for the United States just to step up and step in, and I think there are so many opportunities and I feel confident about this year.”

Trump, a billionaire businessman, has not weighed in on the administration’s move to raise the threshold of workers entitled to overtime from less than $24,000 to just over $47,000.