donald trump is back in washington. after a long president's day weekend in florida. facing a major challenge to his national emergency declaration. 16 states joining together in a lawsuit filed in u.s. district court in northern california. they claim the president is going around congress to reallocate money to pay for the border wall with mexico. california attorney general is leading the charge. >> the president doesn't have the power of the purse. president can't decide to shuffle money around once congress allocated it. that's for congress to do. otherwise president's for the last 240 years would have been doing the same thing. when they don't like where congress puts the money. because trump fabricated a crisis and called it an emergency doesn't mean he can violate the separation of power under the constitution. >> as you know president trump wanted $5.7 billion for the