"I grew up in the projects just like Stevie," one man says.
"I've been an ironworker for 15 years. Stephen Lynch was for 18," says another.
Two other young people in the ad note that Lynch went to college and law school at night, "like me."
"I'm Stephen Lynch," the congressman says at the end, "and I approve this message because I know how hard you work, and in the Senate, I'll never forget it."
The new ad echoes many of the same details Lynch offered in his first ad, in which he introduced himself to voters. It will run at the same time as Lynch's first ad, and is backed by a more than $200,000 buy.
Lynch will face Rep. Edward Markey (D-Mass.) in the Democratic primary for the seat vacated by Secretary of State John Kerry (D). Markey issued his first ad of the campaign last week, which focused on gun control.