Maybe they can ask him about the Canadian-built bus he was touring the country in last week.

WASHINGTON — President Barack Obama will join thousands of union members at Labor Day festivities in Detroit, the Free Press has learned.

Obama will deliver remarks at a Labor Day event sponsored by the Metro Detroit Labor Council, according to a White House official with knowledge of the trip.

While no other details were immediately available, it is likely he would again use the opportunity to tout his administration’s role in the rescues in 2009 of General Motors and Chrysler.