Medicare ranks first in voters' minds and considerably above President Obama's healthcare overhaul as Americans decide who they will support for president, according to a new poll. The Affordable Care Act came in fifth on a list of healthcare issues polled by the Kaiser Family Foundation, with about six in 10 calling the divisive 2010 law important to their vote. Medicare received top billing, meanwhile, with 73 percent saying it is either "extremely" or "very" important as they make their choice for president. The finding comes as Medicare takes center stage in the race for the White House, eclipsing previous debates over the Affordable Care Act.