Dems’ measure blocking Trump emergency will come Friday

President Donald Trump gestures as visiting Austrian Chancellor Sebastian Kurz leaves the White House in Washington following their meeting, Wednesday, Feb. 20, 2019. (AP Photo/Manuel Balce Ceneta)

WASHINGTON — House Democrats will file a resolution Friday aimed at blocking the national emergency declaration that President Donald Trump issued to help finance his wall along the Southwest border, teeing up a clash over billions of dollars, immigration policy and the Constitution’s separation of powers.