Tom O'Halleran and Ruben Gallego planned to introduce an amendment Wednesday to the annual defense policy bill that would require the Air Force to regularly submit presidential travel expense reports to Congress. The two lawmakers have been sharply critical of what they have described as Trump's "frivolous trips," and say presidential travel puts heavy demands on the defense budget. [...] their bid for greater oversight of Trump's travel may face resistance from Republicans as the GOP-led House Armed Services Committee crafts the defense policy legislation.