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Temperatures in the 40s just one of the hurdles that Formula 1 will have to deal with in the desert this time of year.

Explorers who track activity. meanwhile, weekly jobless claims fell by 2,000. and tiffany lowered its guidance due to slowing sales. that is it from cnbc, first in business worldwide. now it's back over to "hardball." back to "hardball." the 2012 presidential race will likely come down to a handful of battleground states. perhaps the most important of them are -- it's always dangerous to say which three but let's try ohio, virginia and florida and say we're learning more about where things stand there thanks to the nbc news marist poll. take a look. in florida, obama is up by 4. 48-44. virgi...