WASHINGTON — When he talks to Republicans in Congress, Scott DeFife, a restaurant industry lobbyist, speaks their language: President Obama's health care law is a train wreck well down the track. There will be collateral damage if changes are not made. Friends of the industry cannot sit back and let that happen. Speaking to Democrats, he puts on his empathy hat: The Affordable Care Act is the law of the land. Its goal of universal insurance coverage is laudable, but its unintended consequences will hurt the cause.