Backers of President Barack Obama’s health care reforms unleashed a television ad in Orlando, Louisville and Washington pillorying Humana’s scare tactics targeting seniors and the plan’s impact on Medicare.

Americans United for Change, Obama’s campaign organization-turned unofficial presidential PR machine, is running the ad and also staging a protest at Humana headquarters in West Palm Beach today at noon.

Last week, the Centers for Medicare and Medicaid Services launched an investigation into Humana Inc.’s possible misuse of beneficiary information to send anti-health care mailers to its Medicare gap coverage enrollees. The Louisville-based insurer is one of the largest Medicare supplemental insurance providers.

Humana sent mailers to seniors in several states, including Florida, containing what could be misleading information about Obama’s plan, warning of cuts to benefits and increases in costs to the popular government-backed insurance plan for seniors.

According to the AARP’s web site, “None of the health care reform proposals being considered by Congress would cut Medicare benefits or increase your out-of-pocket costs for Medicare services.”