A leading member of Congress is demanding more details on the terror threat to the United States. The Chairman of the House Committee on Homeland Security is asking Homeland Security Secretary Michael Chertoff, who said yesterday that he had a "gut feeling" an attack was coming, to share whatever information he has so that the nation’s first responders can be alert and prepared. "Otherwise, we run the risk of communities taking it upon themselves to mobilize for every possible threat," wrote Rep. Bennie Thompson, D-Miss. Chertoff made his comments yesterday to the editorial board at the Chicago Tribune, saying summertime appeals to al Qaeda. "We do worry about whether they are rebuilding their capabilities," Chertoff said. "We strike at them; we degrade them; but they rebuild." Meanwhile, as reported on ABCNews.com’s The Blotter last night, senior U.S. intelligence officials have told ABC News that new intelligence suggests a small al Qaeda cell is on its way to the United States, or may already be here. Blotter Al Qaeda Cell in the U.S. Or On Its Way, According to New Intel The White House has convened an urgent multi-agency meeting for tomorrow afternoon to deal with the new threat. Meanwhile, Rep. Thompson has urged Chertoff to meet with his committee in a classified briefing if necessary. "Words have power, Mr. Secretary," said Rep. Thompson. "You must choose them wisely — especially when they relate to the lives and security of the American public." Do you have a tip for Brian Ross and the Investigative Team?