Click here to watch "Feeling The Pain."

Just hours after John McCain released an advertisement touting his proposals for improving health care, the Service Employees International Union put out its own spot criticizing his approach. Both ads were timed to coincide with McCain's address on health care today.

The union, which has endorsed Barack Obama, is airing "Feeling The Pain" statewide across Ohio as well as in D.C. In the ad, Ohio health care workers say they doubt McCain will curb rising expenses. "John McCain says he'll lower health care costs, but when it comes to making health care affordable here in Ohio, we'll still be feeling the pain," a succession of women in scrubs remark.

Besides criticizing McCain for, among other things, opposing the State Children's Health Insurance Program, "Feeling The Pain" uses file footage of a campaign rally to link McCain to President Bush. Twice, viewers see a black-and-white clip of Bush hugging McCain and kissing him on the head as an announcer lists the times the presumptive Republican nominee has supported Bush's health care policies.

"Feeling The Pain" joins another recent third-party ad in Ohio that seeks to define McCain's candidacy while the Democratic candidates are preoccupied with resolving their primary campaign.

"Clearly, Ohio is going to be a very important state in this election," said SEIU spokeswoman Stephanie Mueller. "We have a number of members there who are excited to work with us on this issue, and we'll be taking our message to many other states in the future."