As Election Central has been noting regularly, one obvious way to keep track of which races the national parties are alarmed about -- or think they can win -- is to check out which races are getting the big daily expenditures of cash. Late yesterday, the NRSC and the NRCC dropped a total of $10 million into races across the country. The NRSC dropped $3,017,920.00 into NJ-SEN, on ads targeting Dem Robert Menendez. And the NRCC sank a total of $7,096,715.82 into dozens of House races. Biggest expenditures: The NRCC pumped hundreds of thousands into each of around a half-dozen races, for ads targeting Dems Angie Paccione in CO-04, Tim Mahoney in FL-16, Baron Hill in IN-09, Patricia Madrid in NM-01, Melissa Bean in IL-08 and Harry Mitchell in AZ-05. Detailed breakdown of NRCC spending here.