WASHINGTON — President Trump is trying to change subject back to his promise to make American job creation a top priority. “We want to get back to running our great country,” Trump said at a White House news conference on Friday after a week that saw Washington and much of the country fixated on the damaging testimony of his fired FBI director. Facing turmoil about investigations that began over his campaign’s ties to Russia, Trump plans to devote next week to bringing more Americans into the economy by having them start working as apprentices.