Four men have filed the necessary paperwork to run for the Republican nomination for the U.S. Senate. The best known name on the list is Ed Gillespie (pictured) of Alexandria, who once chaired the Republican National Committee. The other contenders include small businessman Shak Hill of Centreville, consultant Chuck Moss of Prince William County, and congressional aide Anthony DaTora of Fredericksburg. GOP activists will nominate a candidate during a June 7th convention in Roanoke. The Republican nominee will challenge freshman Democratic Senator Mark Warner in November.