By ASHRAF KHALIL , Associated Press WASHINGTON (AP) — A new art exhibit at a Washington museum shows an Ivanka Trump lookalike pushing a vacuum cleaner and invites spectators to toss crumbs for her to clean up. The  art piece  by Jennifer Rubell, titled "Ivanka Vacuuming," opened Feb. 1 and continues through Feb. 17 at the Flashpoint Gallery. The public is encouraged to "throw crumbs onto the carpet,