The DNC put out a new ad accusing the GOP of inciting mob activity at town hall meetings. At the end of the video, people were given a number and instructed to call the RNC. The RNC had these callers press "1" and they were redirected back to the DNC.
From CNN Politics:
WASHINGTON (CNN) — National Republicans turned the tables on their political counterparts Wednesday by redirecting angry telephone calls coming into their switchboard to the Democratic National Committee.
The DNC released a Web video early in the morning accusing the GOP of inciting mob activity at town hall meetings.
At the end of the video, the DNC instructs people to call the Republican National Committee to express outrage. Callers who dial the RNC's main number to voice their concern about the DNC's charges are told to press 1, which sends them to the DNC's main switchboard.
DNC spokesman Brad Woodhouse described the RNC's redirection as a "neat trick," but said it just further proves the Democrats' point about the GOP.