Arnie Seipel

Updated at 9:30 a.m. ET

President Trump is facing calls to act in the wake of the latest mass shooting, which killed 17 people on Wednesday at a high school in Florida, and the White House is not ignoring them. The president will participate in a pair of listening sessions on school safety this week, and on Monday morning the White House said he supports efforts to improve the federal background check system, something Congress has expressed broad support for without acting on after past shootings.

While a lot of furious negotiation has been going on behind the scenes on Capitol Hill to end a partial government shutdown, to voters and cable news viewers it may look like most of the work in Washington is going into pointing fingers.

As the countdown to shutdown hit zero, an official White House statement called Democrats "obstructionist losers."

Democrats pointed to President Trump's inconsistent statements on immigration to say he's an unreliable negotiating partner.

Updated on Dec. 22 on 12:02 p.m. ET

Congressional Republicans delivered on their first major legislative accomplishment of the Trump era on Wednesday, when the House voted 224-201 to pass a $1.5 trillion tax package. The bill cuts individual rates for eight years and slashes the top corporate tax rate to 21 percent permanently.

Updated at 7:29 p.m. ET

In making his "closing argument" for tax legislation expected to get a vote in Congress next week, President Trump announced that the changes would take effect early next year.

Updated at 6:17 p.m. ET

Congress has voted to avert a partial government shutdown that could have come Friday night.

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