The campaign of Dr. Abdul El-Sayed, the Democratic candidate for Senate in Michigan, is airing a new 30-second ad leaning into his Muslim faith, which has fueled many of the attacks Republicans have hurled at him in a hotly contested race.

Here’s a look at the ad.

On the Screen

The ad features Dr. El-Sayed sitting in a leather armchair, hands clasped around a mug and speaking soberly. As it cuts to black-and-white nature scenes and images of places of worship, the candidate describes how faith shapes his life. He never explicitly names his religion — Islam — instead invoking belief and religious practice more generally.

The Script

Dr. El-Sayed

“My name is Abdul. It means ‘servant.’ I pray every day. I reflect on my role in this life, on this earth. How we leave it better than we found it. To serve God, to serve our neighbors.

All across Michigan, families pray. They feel hopeless. Faith is a thing there’s just too little of in Washington. We don’t have faith in our future. We don’t have faith that we can actually fix things.

So, yeah, we need a few more people of faith in Washington. I’m Abdul El-Sayed, man of faith. That’s a good thing. And I approve this message.”

The Takeaway

Republicans have lobbed frequent attacks at Dr. El-Sayed during a bitter Senate campaign, invoking his Muslim faith, including calling him a “jihadist” and a “Muslim radical.” By leaning into that faith in his latest ad, the candidate appears to implicitly rebuke his opponents, including President Trump, who have repeatedly attacked him for it.

Dr. El-Sayed’s race against Mike Rogers, a former Republican congressman, is one of the tightest of the midterms, and will most likely help determine control of Congress for Mr. Trump’s final two years in office. Dr. El-Sayed, a vocal critic of the Israeli government, squeaked out a narrow primary victory against a strong defender of the country.

Some Democrats saw that as a referendum on the party’s position on Israel, while Republican leaders used Dr. El-Sayed’s position to help fuel Islamophobic attacks that sought to portray him as an anti-American extremist.

Mr. Trump has made Dr. El-Sayed’s faith, as well as his name, a recurring theme at rallies across the country in recent weeks as he seeks to boost Republican chances. “I call him Mohammed. Somebody said, ‘His name isn’t Mohammed; it’s Abdul,’” Mr. Trump said at a campaign rally in Tennessee, adding, “To me, he’s Mohammed, and he’s a radical jihadist.”

Dr. El-Sayed has also faced questions on the campaign trail about his faith. “I’m not running to be a Muslim senator,” he said in answer to a question from an attendee at a town hall over the weekend, pushing back against the implication that he might harbor dual loyalties.

“I’m running for the U.S. Senate,” Dr. El-Sayed said, “and happen to be Muslim.”