President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE is reportedly frustrated with chief of staff John Kelly John Francis KellyMORE over his handling of abuse allegations against former White House staff secretary Rob Porter and has started considering replacements.

Sources told NBC News that Trump is angry over Kelly's statements on Porter, specifically his initial defense of the top aide following allegations of domestic abuse. According to sources, Trump has openly talked about replacing Kelly.

NBC News reports that Office of Management and Budget Director Mick Mulvaney Mick MulvaneyMick Mulvaney to start hedge fund Fauci says positive White House task force reports don't always match what he hears on the ground Bottom line MORE is one of the names Trump has floated to replace his chief of staff.

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Porter resigned Wednesday after reports surfaced of allegations of physical and verbal abuse by his two ex-wives.

Kelly on Tuesday defended Porter as a "man of true integrity and honor" after reports of the alleged abuse first emerged, but later said he was "shocked" by the allegations and insisted that there is "no place for domestic violence in our society."

The chief of staff's backtracking, however, hasn't been enough to stave off backlash.

Kelly has faced scrutiny over his decision to keep Porter on staff despite knowing about the allegations. The FBI reportedly informed the White House of Porter's past behavior while conducting a background check. Porter continued to work at the White House months after officials first learned of the allegations against him, according to reports, and worked in the West Wing without a national security clearance.

Despite Trump's frustration with Kelly over the situation, a source told NBC that he is unlikely to fire his chief of staff "because there's too much drama."

The Trump White House has seen significant turnover of top-ranking officials during the president's first year in office, including chief strategist Stephen Bannon and press secretary Sean Spicer Sean Michael SpicerKellyanne Conway to leave White House at end of month Pro-Trump duo Diamond and Silk launch new program on Newsmax TV The Hill's 12:30 Report - Presented by Facebook - Supreme Court's unanimous decision on the Electoral College MORE.