President Obama is enlisting social media to help him in negotiations with Republicans on the fiscal cliff. The president today asked people to tweet their congressional representatives to urge them to preserve middle-class tax cuts, and he even provided a hashtag: #My2k. “If there’s one thing that I’ve learned, when the American people speak loudly enough, lo and behold, Congress listens,” he said. It's all part of a White House PR campaign just kicking into gear, reports the LA Times.