U.S. President Donald Trump and First Lady Melania Trump react to children dressed up as them during a Halloween event at the White House. Trump's chief of staff today defended the White House response to the coronavirus after infections of at least three staff or advisers to Vice President Mike Pence, but said the U.S. is "not going to control" the pandemic. With a bit of rejiggering, President Donald Trump and first lady Melania Trump played host Sunday to hundreds of superheroes, unicorns, skeletons and even a miniature version of themselves as part of a Halloween celebration at the White House.