ABC News’ Jonathan Karl reports: Taking a shot at some of President Obama’s core supporters, Senate Majority Leader Harry Reid, D-Nev., blasted liberal groups running radio and TV ads pressuring Senate moderates to support President Obama’s budget. Calling the ads "unwise and unhelpful," Reid said, "These groups should leave them [Senate moderates] alone. It is not helpful to me and it is not helpful to the Democratic caucus." The liberal group Americans United for Change is running TV ads in 12 states, targeting a group of Senate Democrats led by Senators Evan Bayh, D-Ind., Tom Carper, D-Del., and Blanche Lincoln, D-Ark., who have expressed concerns about rising deficits and other aspects of President Obama’s budget. Another liberal group, MoveOn.org is running a similar radio ad campaign. Speaking to reporters at a breakfast sponsored by the Christian Science Monitor, Senator Reid said the moderates are valuable and constructive members of the Democratic caucus who are not obstructing President Obama’s agenda. In fact, he suggested liberals shouldn’t target these senators because many of them aren’t all that moderate anyway. "Some people of course go to those meetings [of moderate senators] so they can issue a press release back home that will make them appear more moderate," Reid said.