WASHINGTON — Senate Republicans are unveiling a suite of 16 bills aimed at rooting out fraud, which they believe can save taxpayers some $240 billion, The Post has learned. The bundle of legislation, dubbed the Protecting American Taxpayers Act, spearheaded by Senate DOGE Caucus Chair Sen. Joni Ernst (R-Iowa), is part of a collaboration by GOP lawmakers that kicked into gear earlier this year in the wake of the Minnesota fraud scandal. Over the past four months, GOP lawmakers brainstormed ways to recover stolen money, stop federal funds from getting funneled overseas, impose stronger safeguards on government spending, and target fraudsters.…