From the Hill:

Speculation in Maryland political circles is that Lollar is coming too close for Hoyer’s comfort in the polls, particularly with voter turnout models dramatically favoring traditionally Republican constituencies. So when I hear a Hoyer radio ad or see his new banner ads on the Internet, it tells me that Hoyer’s internal polling must be causing alarm bells to go off. Otherwise, he would be spending all of his money to try to help his fellow Democrats around the country. After all, when John Dingell is in trouble in his family seat in Michigan, the needs of congressional Democrats around the country are surely outstripping their resources, and it is the job of leadership to help fill the money gap in these races.