WASHINGTON (AP) There's a bit of a domino effect undercutting President Barack Obama's health care law. Enforcement of the overhaul's central mandate that individual Americans must have coverage could be weakened by the Obama administration's recent delay of a requirement that larger employers provide medical insurance. That's because the delayed rule also required companies to report health insurance details for employees. Without employers validating who's covered, a scofflaw could lie, and the government would have no easy way to check. The Treasury Department said Tuesday it expects any impact to be minor, since most people will not risk telling the government a lie.