DETROIT, May 28 (Reuters) - The United States is taking an analytical approach to its review of whether to keep tariffs on Chinese goods in place and will not base outcomes on any "breakthrough" in U.S.-China trade relations, Deputy U.S. Trade Representative Sarah Bianchi told Reuters. The Biden administration is not assuming any such breakthrough will happen, but will continue dialogue with China at various levels, Bianchi said in an interview on Saturday as a ministerial meeting of the U.S.-led Indo Pacific Economic Framework talks wrapped up. "We are conducting the review from an analytical perspective. We’re not base-casing any...