President Trump continued on Sunday to rip into Sen. Mitt Romney for criticizing the president for urging foreign leaders to investigate Joe Biden a day after he called the Utah Republican a “pompous ‘ass.'”

“The Democrats are lucky that they don’t have any Mitt Romney types. They may be lousy politicians, with really bad policies (Open Borders, Sanctuary Cities etc.), but they stick together!​” Trump wrote on his Twitter page.

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​In a series of postings on Saturday, the president ​said “somebody please wake up Mitt Romney and tell him that my conversation” with Ukraine President Volodymyr Zelensky “was a congenial and very appropriate one.”

​He also said Romney, who was defeated in 2012 by President Obama, “never knew how to win” before calling him a “pompous ‘ass.'”​

Trump’s lashing out at Romney follow the senator’s criticism of Trump’s comments last Thursday calling on China and Ukraine to investigate Biden, a Democratic presidential candidate.

Romney described Trump’s appeal for an investigation “wrong and appalling” and suggested it was political.

“When the only American citizen President Trump singles out for China’s investigation is his political opponent in the midst of the Democratic nomination process, it strains credulity to suggest that it is anything other than politically motivated​,” Romney tweeted Friday.

Less than two hours later, Trump once again questioned Hunter Biden’s connection to China.

He accused the “Fake News” media of protecting “sleepy Joe Biden” and incorrectly claimed Hunter was paid $100,000 a month for his work with a Ukrainian natural gas company.

“And separately got 1.5 Billion Dollars from China despite no experience and for no apparent reason. There is NO WAY these can be legitimate transactions? As lawyers & others have stated, as President, I have an OBLIGATION to look into possible, or probable, CORRUPTION!” Trump tweeted.

A whistleblower’s complaint claimed Trump pushed Zelensky to look into the Bidens.

Hunter Biden worked for the company that was owned by a Ukrainian oligarch who had been under investigation.

His father was vice president at the time and was the point man on fighting corruption in Ukraine.

The complaint led to House Speaker Nancy Pelosi to begin an impeachment inquiry.

If the Democrat-controlled House votes to impeach Trump, Romney would be among the senators who serve as jurors in his impeachment trial in the Senate.

There is no evidence Biden or his son did anything wrong in Ukraine or in China.