According to a source in Pennsylvania who tracks television advertising by political campaigns, the Democratic Senatorial Campaign Committee bought only $260,000 in TV ads this week in Pennsylvania–about a 50 percent drop from the $500,000 or more the DSCC has been spending on TV ads each week for the past five weeks in the state.

The DSCC’s decision to scale back its ad campaign in Pennsylvania is likely due to the fact that Democrats are now being forced to spend money on other competitive races in states like West Virginia.