Republicans are trying to move protesters further away from their national convention site this summer, but the Secret Service and local officials in Milwaukee aren’t letting them do it. Senate minority leader Mitch McConnell (R-KY) wrote to Secret Service chief Kim Cheatle warning that preliminary plans would create an “area of conflict” outside the convention between protesters, convention-goers and delegates, echoing similar concerns voiced last month by the Republican National Committee, but sources told NBC News the protest zone falls outside security perimeter. “There’s no appetite to al…