The former presidential candidate doubled down on his criticisms of President Donald Trump in a series of tweets Friday morning, calling Trump’s “brazen and unprecedented” calls for foreign meddling in the 2020 election “wrong and appalling.”

While many in the GOP hem and haw their way around impeachment , Sen. Mitt Romney (R-Utah) isn’t holding back.

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.

By all appearances, the President’s brazen and unprecedented appeal to China and to Ukraine to investigate Joe Biden is wrong and appalling.

“Mitt Romney never knew how to win. He is a pompous ‘ass’ who has been fighting me from the beginning, except when he begged me for my endorsement for his Senate run (I gave it to him), and when he begged me to be Secretary of State (I didn’t give it to him),” the president tweeted.

Romney was among the first Republicans to speak out on the allegations, which first appeared in a whistleblower report alleging that Trump ordered aid to Ukraine withheld unless the country delivered him a political favor.

Somebody please wake up Mitt Romney and tell him that my conversation with the Ukrainian President was a congenial and very appropriate one, and my statement on China pertained to corruption, not politics. If Mitt worked this hard on Obama, he could have won. Sadly, he choked!

Mitt Romney never knew how to win. He is a pompous “ass” who has been fighting me from the beginning, except when he begged me for my endorsement for his Senate run (I gave it to him), and when he begged me to be Secretary of State (I didn’t give it to him). He is so bad for R’s!

On Thursday, while attempting to defend his actions, Trump instead openly asked another foreign government, China, to also influence the 2020 election. Hours later, CNN reported Trump had brought up the “political prospects” of former Vice President Joe Biden and Elizabeth Warren while on a call with Chinese President Xi Jinping in June.

“If the President asked or pressured Ukraine’s president to investigate his political rival, either directly or through his personal attorney, it would be troubling in the extreme” Romney said last week. “Critical for the facts to come out.”

Nebraska Sen. Ben Sasse (R) echoed that sentiment last Wednesday after he read the complaint.

“This [is] going to take a long time but there’s obviously some very troubling things here,” Sasse told CNN at the time. “But I think the partisan tribalism that’s always insta-certain is a terrible idea. There are real troubling things here.”

“Republicans ought not just circle the wagons and Democrats ought not be using words like ‘impeach’ before they know anything about the actual substance,” Sasse continued.

Meanwhile, much of the rest of the Republican Party seems content parroting the same lines members used during the Mueller probe.

House Minority Leader Kevin McCarthy (R-Calif.) on Wednesday baselessly accused Democrats of having “rigged” the process, while House Republican Whip Steve Scalise (R-La.) retreated to conspiracy theories and blamed it on “a deep state scheme.”