By Melanie Zanona The Hill Escalating tensions this summer have stepped up fears about political violence. Law enforcement officials, college campuses and cities around the country are bracing for a new wave of alt-right rallies in the weeks and months to come, with parties on both sides of the debate over Confederate statues and monuments prepared for standoffs. At the center of it all is President Trump, whose heated rhetoric has angered opponents while firing up his supporters, magnifying the sense that the political divide in the country is growing wider. http://tpc.googlesyndication.com/safeframe/1-0-10/html/container.html “When there seems to be no More…