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(NBC NEWS) -- Congress gets back to work today, with looming fights in both the Senate and the House.

Another week - another partisan showdown on Capitol Hill. "What we're doing is saying, "Look, American people. Shouldn't President Obama have somebody working for him that he wants?" said Senate Majority Leader, Senator Harry Reid, (D-NV).

Democrats are threatening to change the rules in the Senate. They are unhappy that some of President Obama's nominations are being held up because they can't get over the sixty-vote threshold to stop a filibuster.

Instead of sixty votes Democrats want a simple majority of fifty-one. It's called the nuclear option - and Republicans considered the same maneuver back in 2005 when they were in power. "We went to the brink and we pulled back because cooler heads prevailed, and we knew it would be a mistake for the long-term future of the Senate and the country," said Sen. Minority Leader, Senator Mitch McConnell (R-KY).

Both sides hash out their differences this evening, and if there's no agreement, a vote could come tomorrow.

Meanwhile in the House, Republicans want to delay parts of Obamacare, and hit the reset button the debate over on immigration reform. "The President is already refusing to enforce existing immigration laws. He will not enforce the laws that we might pass," said Rep. Steve King, (R) Iowa.

"Is this immigration system and enforcement really working? No, it's broken." Rep. Steve Israel/ (D) New York

Congress has three weeks left before the august recess, and a lot of work still on the table - including a plan to bring down student loan rates.

A Senate and House divided, with time for action running out.

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