These are some of the stories we are looking at this week.

Magic Number: On Tuesday, Mitt Romney hit the “magic number” of delegates necessary to win the GOP nomination. Today, a new battleground state poll shows, it's all tied up in some of the key battleground states that will decide the 2012 presidential election. The NBC News/Marist poll has the rivals statistically tied in Colorado, Iowa and Nevada. Voters there say the economy is their top issue headed into November.
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