President Donald Trump plans to declare a national emergency on Friday over the coronavirus outbreak, invoking the Stafford Act to open the door to more federal aid for states and municipalities, according to two people familiar with the matter.

Trump is under increasing pressure to act as governors and mayors nationwide step up actions to mitigate the spread, closing schools and canceling public events. The president said he will hold a news conference at 3 p.m. in Washington.

Senate Democrats have urged Trump to invoke the Stafford Act and other disaster declaration requests they say would free up more than $42 billion in funding for states available in the Disaster Relief Fund.