David Pecker, former publisher of the National Enquirer, poked a hole in Donald Trump’s defense in his hush money case Thursday by testifying that the former president made the payments to benefit his 2016 presidential campaign. At a Manhattan court hearing, Assistant District Attorney Joshua Steinglass asked Pecker about a practice called “catch and kill,” in which the magazine would purchase negative stories on behalf of Trump to keep them out of the public eye. Pecker said he “made the assumption” that the payments to women who alleged affairs with Trump were done to keep them quiet for the…