Republican Dr. Mike Katz announced Wednesday that Julianne Murray, a former Delaware Republican Party chair and former U.S. attorney for Delaware, is endorsing his campaign for U.S. Senate. Julianne Murray’s backing gives Katz another conservative supporter as Delaware Republicans decide who should challenge Sen. Chris Coons. By George D. Rotsch, Editor of Delaware LIVE WILMINGTON, DE: Delaware’s 2026 U.S. Senate race is beginning to take shape…