Another day, another hard-hitting Rick Scott TV ad against Sen. Bill Nelson in Florida's U.S. Senate race.

This time it's the pro-Scott New Republican Super PAC out with a new 30-second ad that literally traces the aging of Nelson from his origins as a 29-year-old state legislator in 1972. Eight separate closeups of Nelson's face appear in the 30-second spot, driving a career politician message.

The statewide ad, backed by a $3.5 million buy, starts this week and is backed by 15-second and six-second digital ads, the PAC said.

"Politician Bill Nelson continues to run for public office, leaving few footprints behind," a male narrator says. "Votes with Hillary Clinton 89 percent of the time. And raises taxes again."

Nelson's camp said Scott's ad distorts his record by accusing him of voting to cut Medicare and Social Security. Nelson cited several specific votes. The Democrat said: "Rick Scott just can't tell the truth, so he lies about Bill Nelson's record to hide the fact that he refused over $50 billion to provide nearly 1 million Floridians with health care," a reference to Scott's opposition to Medicaid expansion.

Here's the ad:

Older voters will play a pivotal role in this race — they always do in Florida — and Politico reports that Scott leads Nelson by 9 percentage points among older voters.

In a statewide survey conducted for Politico and AARP by Morning Consult, the two candidates are virtually tied (Scott 40, Nelson 39, with a 3 percent margin of error). Among voters 50 and over, Scott leads 44 percent to 35 percent, with a 4 percent margin of error.

The overall poll surveyed 1,199 Florida voters on May 29-30.

Related: How Rick Scott is grabbing Bill Nelson's campaign strategy