The Department of Homeland Security backtracked on its announcement suspending the Transportation Security Administration's PreCheck program as the agency contends with a partial government shutdown that has entered its second week.Two DHS officials told CBS News early Monday that TSA PreCheck should remain open after the decision reversal but noted that "that's being handled airport by airport." In an earlier statement on Sunday, a spokesperson for TSA had told CBS News that PreCheck "remains operational with no change for the traveling public," but said that if staffing constraints arise due to the ongoing shutdown, it would "evaluate on a case by case basis and adjust operations accordingly.""Courtesy escorts, such as those for Members of Congress, have been suspended to allow officers to focus on the mission of securing America's skies," the spokesperson said.Global Entry, another TSA program, was closed to travelers, following some confusion over its status at airports and other ports of entry,…