Washington (CNN) House Republican leaders have the votes to pass a bill Tuesday to fund the government through March 23, with a full defense appropriations bill attached to the measure, as well as two years of funding for community health centers.

This is the start of the real work -- but far from the finish line. What will the final funding bill look like? Well, that's up to the US Senate. In the meantime, the government shuts down in less than 72 hours.

Bottom line: Major changes are coming to the House proposal when it crosses the Capitol to the Senate -- and House Republicans know that. Senate GOP aides acknowledge the defense funding piece will be stripped out, but what will be added in its place is still very up in the air. What's on the table: Potentially a very big deal. Or just more can-kicking.

Will there be a government shutdown?

According to senior aides -- and lawmakers -- in both parties, in both chambers, no.

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