Koch-backed group airs radio ads against ObamaCare

A similar script was used in an AFP television ad that launched in July.

The group's president, Tim Phillips, said in a statement that the commercials intend to counter the "rosy picture being painted by the White House" about its signature healthcare reform law.

Both supporters and opponents of the healthcare law are ramping up their campaigns ahead of Oct. 1, when people will be able to enroll in the insurance marketplaces for the first time.

The political advocacy group that spun off from President Obama's reelection campaign also unveiled an ad Thursday touting ObamaCare's insurance rebates.