NEW YORK — A veteran tabloid publisher testified Tuesday that he pledged to be Donald Trump ‘s “eyes and ears” during his 2016 presidential campaign, recounting how he promised the then-candidate that he would help suppress stories that had the potential to harm the Republican’s election bid. The testimony from David Pecker was designed to bolster prosecutors’ assertions of a decades-long friendship between Trump and the former publisher of the National Enquirer that culminated in an agreement to give the candidate a heads-up on negative tips and stories so they could be quashed. Pecker is the…