Critics of Obamacare Launch New Ads

Coverage for 2 million people began yesterday

WASHINGTON (Reuters) - Conservative activists opposed to President Barack Obama's healthcare overhaul started a new assault on the Affordable Care Act as more than 2 million people began new health coverage under the law on Thursday.

One group, which is backed by the libertarian billionaire brothers Charles and David Koch, launched a $2.5 million television ad campaign that targets three Democratic senators who support the law and could face stiff challenges from Republicans in November elections.