The Trump campaign has hired its own in-house attorney for its 2020 reelection bid — shifting future business away from Jones Day, the law firm, that has represented Trump since his first run for president.

Campaign officials and advisers cast the decision to hire Nathan Groth — a former lawyer for the Republican National Committee and Wisconsin Gov. Scott Walker — as a money-saving move, supported by the businessman-turned-president who loves to cut costs.

But close Trump advisers say the decision also stems from disappointment with the White House’s former top attorney and current Jones Day partner, Don McGahn, whose behavior has irked the president and some of his family members.