Stephen Miller Stephen MillerSpecial counsel investigating DeVos for potential Hatch Act violation: report Trump confirms another White House staffer tested positive for COVID-19 Biden pick creates furor, underscoring bitterness over Obama immigration policy MORE, an architect of many of the White House’s harshest immigration policies, said in a new interview that he felt a “jolt of electricity to my soul” when President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE announced his candidacy.

Miller told The Washington Post that he felt “as though everything that I felt at the deepest levels of my heart were for now being expressed by a candidate for our nation’s highest office before a watching world” upon watching Trump's announcement.

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Senior White House officials told the Post that Miller’s function within the administration frequently has been to develop more detailed policy based on Trump’s more visceral, instinctive attitudes about immigrants. They specifically cited the expanded “public charge” proposal, which would limit green cards for legal immigrants receiving public aid.

"Does the president believe that poor immigrants who can’t support themselves should live off the public dole? No,” one official told the newspaper. “Did he have any idea what the public charge rule was before Miller? No.”

Some former administration officials told the Post, however, that Miller’s attempts at overhauling immigration policy have been unsuccessful, citing an influx of migrants crossing the border and numerous court decisions against the White House.

The Post also quotes senior White House officials who say Miller has derided Jared Kushner Jared Corey KushnerAbraham Accords: New hope for peace in Middle East Tenants in Kushner building file lawsuit alleging dangerous living conditions Trump hosts Israel, UAE, Bahrain for historic signing MORE’s more moderate immigration positions as well as Trump's son-in-law's knowledge of the issue, which Miller called “utterly malicious fabrications.”

One former Department of Homeland Security (DHS) official suggested Miller was motivated by racism, telling the Post: “I don’t know what other principle could animate such a laserlike focus.”

Miller responded that anyone who described him as racist was “an ignorant fool, a liar and a reprobate who has no place in civilized society.”

Miller has reportedly regularly gone past DHS leadership to give lower-level officials direct orders, which former DHS head John Kelly John Francis KellyMORE ordered him to stop but which he resumed under Kelly’s successor, Kirstjen Nielsen Kirstjen Michele NielsenMore than million in DHS contracts awarded to firm of acting secretary's wife: report DHS IG won't investigate after watchdog said Wolf, Cuccinelli appointments violated law Appeals court sides with Trump over drawdown of immigrant protections MORE.

“He’s always micromanaging everything we do, or trying to, without really knowing or appreciating the operational challenges,” a DHS official told the Post.