When President Trump tried to undermine and overturn the election results in 2020, he ran into stiff pushback — not just in the courts, but from many officials in his own government.He made sure there would be little room for such dissent when he returned to the White House. Those seeking to join Mr. Trump’s second administration had to pass a key litmus test: Did they believe the 2020 election was stolen from Mr. Trump?With like-minded allies now positioned in key roles throughout the government, Mr. Trump has trained the full arsenal of the federal government on one of his...