ST. LOUIS (KMOX) - The latest controversy in the U.S. Senate race revolves around an advertisement. It's aimed at African-American voters in St. Louis, but the leader of a Muslim advocacy grup called it "Islamophobic."

The ad is paid-for by Stars and Stripes Forever PAC, supporting Josh Hawley, who is facing incumbent Democrat Claire McCaskill in a race that could help determine control of the Senate. Last week we brought you the Republican's response, as Hawley said he's "against any kind of discrimination."

But Sen. Claire McCaskill doesn't think his reaction went far enough.

"I can assure you, if anyone runs an ad like that against Josh Hawley, I'll hold a press conference and condemn it. There's no place for hatred and bigotry," McCaskill says.

The ad begins with a child in conversation with her father, she says, "But, Dad, my teacher says Christians, Jews and Muslims all worship the same God. What's wrong with that?"

Her father responds, "What's wrong, honey, is that it's not true."

The narrator then urges people to "vote no on Claire McCaskill and her Democrat agenda. Vote yes for our children."

Here is a clip from the add:

Caught the middle/end of this sound clip. This is the hate message being spread in our state. Listen closely pic.twitter.com/djM7DdwFiF — Umi (@Umik90) September 20, 2018

Hawley told KMOX he hadn't heard the ad and his campaign didn't have anything to do with it.

"I hope that voters will make up their mind on (other) differences instead of the kind of hatred that's being spued in this add," McCaskill says. "And it's disappointing that Josh Hawley can't just stand up and say, 'It's wrong.'"

The PAC's website says they aim to persuade black voters to support Republican candidates.