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CBS News estimates that when all the votes are counted, Mitt Romneywill take the Maryland GOP primary and with that victory go over the halfway mark in the number of delegates needed for the Republican nomination.
Rick Santorum wins the Minnesota and Colorado caucuses and also wins the non-binding primary in Missouri.
CBS News projects that Rick Santorum will win the Minnesota caucuses and the non-binding Missouri primary. The results from Colorado are still being counted.