President Donald Trump, flanked by Senate Majority Leader Mitch McConnell, left, and House Speaker Paul Ryan, speaks June 6 at the White House. Trump resumed his taunts of his party's Senate leader, expressing disbelief that McConnell couldn't persuade a Republican majority to pass a health care bill.

WASHINGTON — President Donald Trump escalated a stunning feud against his top Senate partner Thursday, suggesting Majority Leader Mitch McConnell might have to think about stepping aside if he doesn’t deliver on the president’s agenda of health care, taxes and infrastructure.

Trump called McConnell’s failure to pass an “ObamaCare” repeal last month “a disgrace.” Asked if McConnell should consider stepping aside or retiring, an outcome some conservatives are openly clamoring for, the president’s response was far from a vote of confidence.

“Well I tell you what, if he doesn’t get repeal and replace done and if he doesn’t get taxes done, meaning cuts and reform, and if he doesn’t get a very easy one to get done, infrastructure, if he doesn’t get them done, then you can ask me that question,” the president told reporters in Bedminster, N.J., where he is in the midst of a 17-day break from Washington.

Trump later added that he is “very disappointed in Mitch” but would be the first to praise him if legislation begins moving, once again presenting himself as a passive observer in the process rather than a dealmaker with the presidential pulpit.

A sitting president openly turning on a Senate majority leader of his own party in such a fashion is practically unheard of — yet another norm destroyed since Trump’s rise on the political scene. And while the fighting words might elate Trump’s core supporters, they can only hurt broader Republican efforts to move major legislation this fall on taxes and spending while preparing for congressional elections next year where energized Democrats are rallying to retake the House. Republicans control both chambers, but the Trump factor in many races remains a mystery.

Trump’s comments came after he spent two days slamming McConnell on Twitter, writing Thursday morning that after “screaming” about repealing and replacing “ObamaCare” for seven years, McConnell “couldn’t get it done.” Several hours later, the president’s tone took a motivational turn as he exhorted McConnell to “get back to work” and pass bills. “You can do it!”

The presidential megaphone amplified the McConnell-bashing that’s been snaking through conservative media: Breitbart News, Fox News’ Sean Hannity and radio host Rush Limbaugh are among those who have vilified the leader after the Senate’s failure on health care late last month.

McConnell touched a nerve by telling an audience in his home state that Trump had “not been in this line of work before” and had “excessive expectations about how quickly things happen in the democratic process.”

What followed was a “tense” phone call between the two men, according to a person familiar with the exchange.