Obama administration officials say they were expecting praise from critics of the new healthcare law when they offered to exempt selected employers and labor unions from a requirement to provide at least $750,000 in coverage to each person in their health insurance plans this year. Instead, Republicans have seized on the waivers as just more evidence that the law is fundamentally flawed because, they say, it requires so many exceptions. To date, for example, the administration has relaxed the $750,000 standard for more than 1,000 health plans covering 2.6 million people. The waivers have become a flash point as supporters and opponents try to shape public perceptions of the law, the Affordable Care Act, signed by President Obama last March 23.