It’s becoming clear that, assuming it passes, Democratic health care reform will be a major issue in the 2010 congressional races. Several prominent Republicans – including Newt Gingrich and Dick Armey – are already advising GOP candidates to call for full repeal of the legislation. Democrats, meanwhile, are expected to campaign on the merits of the bill, hoping voters “warm up” to health care reform by Election Day. Which strategy prevails could all come down to timing.