Intentional or not, the tactics smack of the made-for-TV politics that Mr. Trump mastered beginning with descent on Trump Tower’s golden escalator in 2015 to kick off a presidential campaign that rewrote the rules for political communication. One of the first people to appear on-screen in the hearings was Mr. Trump’s elder daughter and former White House aide, Ivanka Trump, who told the committee she accepted Mr. Barr’s view that election fraud claims didn’t amount to much. She also said Mr. Trump tried to steer his motorcade toward the Capitol after his speech and that, one time, White House staff had to clean ketchup off the wall after Mr. Trump erupted in rage over post-election matters.