WASHINGTON — President Trump will treat the November midterm election like a presidential campaign, his senior leadership team tells The Post — traveling like he’s on the ballot, flooding key races with cash and hammering home how his policies will help Americans with affordability.  “He’s going to campaign like it’s 2024,” Susie Wiles, Trump’s 2024 campaign co-chair turned chief of staff, told The Post. The White House views Republican control of Congress as essential to maintain Trump’s power