Senate Republican leader starts clock ticking to Gorsuch showdown

By Lawrence Hurley and Richard CowanWASHINGTON (Reuters) - The U.S. Senate moved on Tuesday toward ramming through approval of President Donald Trump's Supreme Court nominee this week, as its top Republican said he had the votes to wipe away Democratic roadblocks but vowed to preserve the minority party's ability to hold up legislation.Majority Leader Mitch McConnell plans to change the Senate's long-standing rules in order to eliminate the ability to use a procedural hurdle called a filibuster