U.S. Rep. Doug Collins, R-Gainesville, warned a Gainesville audience Thursday that the Affordable Care Act debate will heat up in the weeks leading to Oct. 1, when Americans can sign up for insurance through health care exchanges. “If you don’t like ugly politics, turn your TVs off in September,” said Collins, speaking at the Gainesville Civic Center to the Greater Hall Chamber of Commerce’s board of directors. Health care reform’s individual mandate takes effect Jan. 1, with all Americans required to have insurance either through their employer or buying a private plan.