This is a common White House refrain that has been extensively discussed and fact-checked. See here, here, and here, and see also an earlier claim with more specific historical references.
Yet as even The Washington Post has reported, the Senate is conducting the slowest confirmation process in American history.
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But it is historic in the level of obstruction that is denying the will of the American people who elected a new administration and expect that administration to be able to staff the departments.
—White House Director of Legislative Affairs Marc Short
Press Briefing, July 10, 2017
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