Moderate House Democrats, particularly those facing competitive 2010 races, are taking fire from all sides on the health care debate.

The Republican National Committee is going after 60 Congressional Democrats, including 41 CQ Politics rates as at least somewhat vulnerable in 2010, in a radio ad pressuring them to oppose the Democrats’ health care overhaul proposals.

The ad, airing in 33 states, is part of a campaign the RNC is waging against the health care overhaul through the end of August. The committee is committed to spending nearly $1 million nationwide, which includes a television ad already on the air in North Dakota, Nevada, and Arkansas — the latter two of which are likely to host competitive Senate races in 2010. It is all part of a recent blitz of health care-related ad buys the parties and interest groups are making as they gear up for a full-court grass-roots press on the issue during Congress’ August recess.