Market comeback's fate in the second half may be determined by Congress

Lights shine from the U.S. Capitol dome prior to a vote in the U.S. House of Representatives on two articles of impeachment against President Donald Trump in Washington, December 18, 2019.
Joshua Roberts | Reuters

The next headwind for Wall Street could come straight from Washington, as Congress moves toward a new fiscal package to help the economy recover from the coronavirus shutdowns.

The concerns are it may be too little, too late, and the path to get it done will likely be contentious.