For one thing, key details remain elusive. President Donald Trump did not offer a specific legislative package at a Capitol Hill meeting Tuesday with Senate Republicans, our Congress team reports. And asked about the size of Trump's payroll tax cut Tuesday afternoon, White House economic adviser Larry Kudlow told reporters that the administration was still working it out.

For another, things are already breaking down along partisan lines, with House Democrats planning a vote on their own plan as soon as this week. Republicans likewise have concerns about what the White House has proposed.

What's at stake — POLITICO's Nancy Cook on what could go wrong: "If the coronavirus spreads quickly and morphs into a more devastating pandemic, the billions of dollars in stimulus money [Trump is] discussing today likely will not be enough to provide relief to American workers, small businesses and major industries hit by an economic downturn.