Rep. Chris Van Hollen (D-Md.) slammed Fox News host Glenn Beck's planned rally in the nation's capital this weekend as "blatantly political."
The head of Democratic Congressional Campaign Committee also predicted that "outrageous rhetoric on the right" will prove a turnoff to swing voters this fall.
Beck and the organizers of this weekend's "Restoring Honor" rally are billing it as a "non-political" event.
Former Alaska Gov. Sarah Palin is among the planned speakers and Tea Party activists and organizers have helped put the event together.
"Let's call it what it is," Van Hollen said of the rally during an appearance at the National Press Club Friday. "It's a blatant political effort."
The Democratic campaign chief said for the past 15 months, Beck and other conservative talk hosts have offered nothing more than "a constant tirade against the president, against Democratic efforts to get the economy turned around."
Van Hollen predicted "Americans are going to be turned off by just the outrageous rhetoric on the right," ahead of November, much of which he characterized as "conspiracy theories, rants."
He said while it fires up a certain portion of the electorate, he called it "a turnoff to the sensible center."
The congressman predicted Friday that Democrats will retain their majority in the House this fall.