A partial shutdown of the federal government began just after midnight Saturday, after Congress and President Trump were unable to resolve an impasse over his demand for funding for his border wall. The stalemate comes just ahead of the Christmas holiday period next week, though if a way forward is found over the weekend the impact could be minimal since Monday and Tuesday are already federal holidays. Both the House and Senate are adjourned until noon on Saturday; once they return to Capitol Hill, lawmakers hope to try to find a way forward, with members set to be given a 24-hour notice of any planned vote. Still, it's the third time this year that the federal government has been shuttered, even if only briefly. A government shutdown is typically an unlikely occurrence and is virtually unheard of under unified party control, underscoring the dysfunction that's become normal in Washington even with a GOP-controlled Congress and White House through year's end. But with Democrats set to control the House of Representatives come January, Trump saw the chance of receiving the funding he desired for his signature campaign issue about to vanish. Under pressure from his base and conservative commentators, he insisted more than $5 billion in funding for his border wall be included in any spending measure passed to keep all of the government operating. He seemed to be flexible on the materials that would be used, as he has reportedly talked about steel slats and even tweeted a cartoon-like rendering of such an idea, but billions in spending to build some type of barrier along the southwest border remains a requirement. Wednesday, the Senate passed a bill that would have funded the government through early Februaryand it looked like a shutdown would be avoided. But that deal fell apart on Thursday, when Trump indicated he wouldn't sign that bill after all. The House then passed legislation that included the money Trump wants for the border wall but the House bill doesn't have the votes to pass in the Senate. Majority Leader Mitch McConnell, R-Ky., indicated Friday night the Senate wouldn't take any more futile votes until a deal all sides could support was reached. Vice President Pence, who had to break a tie on a procedural vote in the Senate Friday evening, budget chief and incoming White House acting chief of staff Mick Mulvaney and White House senior adviser Jared Kushner met with both Republican and Democratic party leaders throughout the day, and indicated negotiations would continue through the weekend. Three-quarters of the government will not be affected, since budget bills funding those operations had already been approved. But the remaining 25 percent subject to the shutdown includes many important agencies and departments, including Homeland Security, Justice, Commerce, Interior, Agriculture, Housing and Urban Development and Transportation. Even within those affected, some personnel are deemed essential and will be expected to report to work, albeit without pay, for now. That includes FBI officers, TSA agents — during one of the busiest travel periods of the year — Border Patrol agents and others. In the past, however, Congress has usually approved back pay for furloughed federal workers. The political finger-pointing over who was to blame started well ahead of final negotiations. Trump tweeted Friday morning that "The Democrats now own the shutdown!" However, in an Oval Office meeting last week with House Minority Leader Nancy Pelosi, the likely next speaker of the House, and Senate Minority Leader Chuck Schumer, Trump said he would be "proud" to shut down the government over the wall. "I'll be the one to shut it down. I will take the mantle. And I will shut it down for border security," Trump said then. Trump had been slated to depart Friday for a 16-day holiday vacation at his Mar-a-Lago resort in Florida, but postponed the trip once it was clear the government would shut down. Friday night, Trump posted a video to Twitter seemingly taking yet another position about responsibility for the shutdown vis-a-vis Democrats. "We're going to have a shutdown. There's nothing we can do about that because we need the Democrats to give us their votes. Call it a Democrat shutdown, call it whatever you want, but we need their help to get this approved," the president said. "So Democrats, we have a wonderful list of things we need to keep our country safe. Let's get out, let's work together, let's be bipartisan and let's get it done. The shutdown will hopefully not last long." Democrats, however, framed the situation far differently. On Thursday, Schumer said Trump's "temper tantrum will shut down the government, but it will not get him his wall." And Thursday night, Pelosi said on Twitter that "Democrats are for real border security solutions. Not for wasting billions of taxpayer dollars on an immoral, ineffective & expensive wall." Copyright 2018 NPR. To see more, visit https://www.npr.org.