David Welna | New Hampshire Public Radio

David Welna

Mitt Romney's decisive victory in Arizona on Tuesday won him every one of that state's 29 delegates in what was a winner-take-all election. But it was quite a different story in Michigan.

Even though Rick Santorum finished 3 percentage points behind Romney, Santorum ended up with the same amount of delegates: 15. That's because Michigan awards most of its delegates according to congressional districts.

Every one of the 10 states voting next week on Super Tuesday will also award delegates on a proportional basis.

Picking Up Delegates

The U.S. Senate wrapped up a tumultuous year of divided government with votes that keep the federal government funded through September and extend expiring unemployment benefits and a payroll tax cut another two months.

In a rare Saturday year-end session, the Senate's action averted a shutdown but was not the last word on the payroll tax cut extension.

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