In the perpetually fluctuating universe of who lawyers representing Donald Trump, White House counsel Pat Cipollone will argue the president's case during a likely Senate impeachment trial.

The situation will put under the lights a former corporate lawyer who banked millions, once worked for Attorney General Bill Barr, and penned a scathing letter refusing to cooperate with the Democratic impeachment inquiry.

It is Cipollone who will be arguing during the televised trial, Bloomberg News reported. Opposing him will be Democratic House members he frustrated with his refusal to provide any documents despite their subpoenas.

WAWhite House Counsel Pat Cipollone exits the U.S. Capitol after meeting with Senate Majority Leader Mitch McConnell (R-KY) on December 12, 2019 in Washington, DC. He will argue Trump's case in a Senate impeachment trial, Bloomberg News reported

Cipollone was born to an Italian immigrant father, the New York Times reported in an October profile when Congress and the White House were at war over documents and testimony.

He spent time growing up in the Bronx, and graduated at the top of his class at Fordham University in New York. The practicing Catholic is active in a number faith charities, takes part in the March for Life, and has ten children.

He hauled in a stunning $7 million in 2017 as a lawyer for Stein, Mitchell, Cipollone, Beato & Missner, where he was a partner. He previously worked for Kirkland & Ellis.

A single cash account had between $1 million and $5 million. He also had holdings in Goldman Sachs, did work for Bechtel Corporation defense contractor, worked on behalf of Sony and Universal Music Group, Fox News host Laura Ingraham, and three 'confidential' clients.

He owns up to $6 million in land in Virginia's Fauquier County, according to his disclosure.

He was seen in the Capitol this week as he huddled with Senate Majority Leader Mitch McConnell, who said he is coordinating with the White House.

Cipollone infuriated Democrats and Trump critics with his scathing eight-page letter where he refused White House participation. He referred to their 'impeachment inquiry' using quotation marks. He accused them of trying to 'overturn the results of the 2016 election.' He said President Trump 'will reject your baseless unconstitutional efforts to overturn the democratic process.'

Cipollone, left, helped carry out Trump's total resistance to the Democratic impeachment inquiry. Acting Chief of Staff Mick Mulvaney, right, is among those who failed to comply with Democratic subpoenas

Attorney General William Barr, left, and White House Counsel Pat Cipollone, are seen during a meeting with President Donald Trump in the Oval Office of the White House, Thursday, Nov. 14, 2019, in Washington

Cipollone penned a letter to House Democrats that mocked the 'impeachment inquiry' and put it in quotation marks

George Conway, husband to White House counselor to the president Kellyanne Conway, blasted the letter

President Trump has relied on Cipollone as White House counsel while his administration refused to turn over documents or witnesses to Congress

He skipped over a reliance on case law with his combative tone, which got good reviews from Trump lawyer Rudy Giuliani. GOP lawyer George Conway, a leading Trump critic and the husband of White House counsel Kellyanne Conway, agreed.

Wrote George Conway of the letter: 'I cannot fathom how any self-respecting member of the bar could affix his name to this letter.; He called it 'pure hackery, and it disgraces the profession.'

Pam Bondi, the Trump ally and former Florida attorney general who joined the White House impeachment messaging effort called Cipollone 'one of the brightest, if not the brightest attorney I have ever worked with in this country,' NBC News reported.