| CNN.com delivers up-to-the-minute news and information on the latest top stories, weather, entertainment, politics and more. | Santorum gains in Ariz. before debate | | On the eve of the last debate before crucial primaries, Republican presidential challengers Rick Santorum and Newt Gingrich battled for conservative support by targeting President Barack Obama in increasingly strident attacks Tuesday. |
| WH: New measures possible in Syria | | U.S. officials called Tuesday for international action to stop the violence orchestrated by Syrian President Bashar al-Assad and left open the possibility of "additional measures" if the bloodshed continues. |
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