The good news is no one can say President Trump didn’t try to persuade House Republicans that they should pass the American Health Care Act. He invited lawmakers to the White House, dispatched his key aides to Capitol Hill, worked the phones, cajoled, charmed, arm-twisted, threatened . . . He did everything short of actually attempting to understand why House Republicans didn’t want to vote for it. President Trump and Speaker Paul Ryan chose to cancel the vote on the AHCA late Friday afternoon. Earlier this week, the loudest argument from Trump was that if House Republicans didn’t pass the...