President 's rocky relationship with Capitol Hill faces a crucial test Tuesday with a meeting with top Republican and Democratic congressional leaders that could edge the government closer to a year-end bipartisan fiscal deal — or a federal shutdown. Leaders in both parties spent Monday preparing to make their case to an unpredictable president who abruptly sided with the last time he sat down with top leaders. Ahead of the meeting with House Speaker , R-Wis., Majority Leader Mitch McConnell, R-Ky., House Minority Leader , D-Calif., and Senate Minority Leader , D-N.Y., there were unresolved questions about how much more money the federal government may spend in the coming years — plus pressing concerns regarding immigration and health care. With government funding scheduled to dry up on Dec. 8, both sides have floated the possibility of passing a short-term plan that would push negotiations until just before Christmas. Currently, may spend no more than $549 billion for defense programs and $516 billion for non-defense programs next year, a cut from current levels. But the Trump administration and defense hawks want to boost defense spending to more than $600 billion, and Democrats are demanding a dollar-for-dollar increase in non-defense spending. In a sign of how serious are about boosting Pentagon spending, Defense Secretary James Mattis is expected to attend the meeting, according to aides. White House legislative affairs director Marc Short said the West Wing is "anxious to find a path forward on budget caps" that would pave the way for a long-term government spending bill. He said the president "will listen to both sides" in the meeting but will stick to such priorities as the need to rebuild the military. In an interview Monday, Short declined to get ahead of Trump on the issue of "Dreamers," or young undocumented immigrants brought to the United States by their parents. But Short did not sound open to meeting the demands some Democrats are pushing to offer permanent protections to that population. "Leader Schumer has had many comments in the past about why we should not attach policy riders to spending bills," said Short. Schumer last year warned