Arkansas Republican Senate candidate Rep. Tom CottonThomas (Tom) Bryant CottonGOP looks for Plan B after failure of immigration measures Senate rejects Trump immigration plan Our intelligence chiefs just want to tell the truth about national security MORE is out with a new ad, a soft bio spot that features his mother touting his military background.

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In the 30-second ad, Avis Cotton tells of Cotton's father's service in the military, and how it preceded Tom's.

“Tom has a passion to serve our country. After Harvard, he gave up a great career to volunteer for the Army,” she says. “They offered to make him a military lawyer, but Tom insisted on the infantry, just like his dad."

"We need people in Washington who do the hard things.”

It's Cotton's second ad of the cycle. His first slammed incumbent Sen. Mark PryorMark Lunsford PryorMedicaid rollback looms for GOP senators in 2020 Cotton pitches anti-Democrat message to SC delegation Ex-Sen. Kay Hagan joins lobby firm MORE (D-Ark.) for his support for ObamaCare.

Pryor is considered Democrats' most vulnerable incumbents, and Republicans are already pouring heavy resources into the Arkansas Senate race to weaken him.

Both Pryor and Cotton have their own sizable war chests, however, and can afford to keep up the air war that is already underway through Election Day.

Pryor in October released an ad attacking Cotton for the government shutdown.