A.M. Links: Romney Leads in Florida, Political Ad Spending Rises, European Leaders Agree to New Deficit Pact, Occupy D.C. Still Occupying D.C.

• Today is the Florida GOP primary. Polls show Mitt Romney in a comfortable lead. Here are five counties to watch. Nearly 600,000 votes have already been cast in the state. In related news, Romney likes Cheetos. 

• Political ad spending by outside groups is up 1,600 percent this campaign season versus the 2008 election.
• Thanks to a new deficit treaty, 25 of 27 European leaders agree: They'll try to avoid letting their countries' public finances end up buried in debt. And this time they really mean it. 
• Europe's commitment to the new treaty will be tested soon enough: New reports suggest that the euro zone might be on the brink of a recession.
• Occupy D.C. protestors remained in their tents after a noon deadline to remove camping gear from the park yesterday. "We're just having a great party," Occupy DC protester Sara Shaw told CNN. 
• President Obama participates in Google chat, offers to help woman's out-of-work husband find a job. 
• Things the U.S. government does: Pays contractors to design computer programs intended to train giant rats and puppies to sniff explosives.
• Stem cell experiments are beginning to see small successes. 

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