This from Hotline OnCall's Jeremy Jacobs: Democrats are spending $6.3 million on House races this week, while targeting at least one race thought to be firmly in the GOP's grasp.

Jacobs reports on the Democratic Congressional Campaign Committee's spending:

That is still less than the $8M the NRCC spent on ads this week in more than 50 districts, but it reflects that the DCCC is ramping up its ad buys as planned. While the NRCC has planned to spend early in an attempt to damage Democrats, the DCCC has reserved the bulk of its resources for the final two weeks of the campaign -- so, starting next week.

Ad buys, as always, provide insight into where national Democrats believe their candidates are running well as well as which Democrats may be in trouble. And this week, there are a few surprises in where the DCCC has dedicated significant resources.

The biggest surprise is the DCCC spending the most -- $354K -- against state Sen. Andy Harris (R) in his challenge to first term Rep. Frank Kratovil (D). This district was considered as good as gone for the Democrats at the beginning of the cycle, and Kratovil was even mentioned in a New York Times article that suggested he was one incumbent the DCCC was considering cutting loose.

Read the full story at Hotline OnCall.