House Speaker Nancy Pelosi of Calif., center, speaks to reporters as she leaves an event with furloughed federal workers amid the partial government shutdown, Wednesday, Jan. 16, 2019, on Capitol Hill in Washington. (AP Photo/Andrew Harnik)
WASHINGTON, D.C.: US President Donald Trump forced the cancellation Thursday of a trip to Afghanistan by his Democratic opponent Nancy Pelosi, and scrapped administration officials' travel to the Davos forum as a government shutdown plunged Washington deeper into deadlock.