Congress is set to approve the next coronavirus aid package, a $483 billion deal backed by the White House to replenish a small-business payroll fund and pump more money into hospitals and testing programs.

House leaders' plan for swift action on a $2.2 trillion package to ease the coronavirus pandemic 's devastating toll on the U.S. economy and health care system ran into complications Friday as a maverick conservative threatened to delay passage until most lawmakers return to Washington for a vote.

Senate Majority Leader Mitch McConnell unveiled a sweeping economic rescue plan Thursday to pump $1,200 direct checks to taxpayers, $300 billion for small businesses to keep idled workers on payroll and $208 billion in loans to airlines and other industries.