Louisiana Senate candidate Charlie Melancon (D) spent a modest amount on his first TV ad, which started airing Tuesday.

The ad is mostly introductory, but it slams Sen. David Vitter (R-La.) for being dishonest.

"I'm Charlie Melancon, and I approved this message because David Vitter hasn't been honest with Louisiana," the congressman says in the ad.

It's a $115,000 ad buy -- with two-thirds going toward broadcast TV -- that will air through Aug. 16, according to a Republican strategist who tracks Democratic ad buys. The ad isn't running in the Democratic stronghold of New Orleans or in Baton Rouge.

The ad also emphasizes Melancon's willingness to work with the GOP.

"I'm a pro-life, pro-gun Louisiana Democrat," he says in the 30-second spot. "I've been a businessman most of my life. And my philosophy is simple. When it comes to fixin' this economy and protectin' your family, I'll work with anyone, if it's the right thing to do for Louisiana."