When Sen. Ed Markey and Rep. Seth Moulton met for their third and final debate Thursday evening, the two repeatedly argued over Markey’s recent record in Washington, with Moulton arguing that his opponent’s work has not been enough.

The two took turns answering questions and commenting on each other’s responses in Thursday night’s debate, which lasted nearly an hour. Democratic voters will take to the polls and decide which of the two candidates will become the party’s nominee for the open Senate seat on Tuesday, September 1.

Some questions in Thursday’s debate were asked by Massachusetts residents who had submitted videos of themselves raising concerns. The first voter asked Markey and Moulton which methods of lowering energy costs for residents they would support.

Markey brought up the Green New Deal, a bill he wrote with Alexandria Ocasio-Cortez, who announced her endorsement for the Senator in his re-election campaign today.

“It was to unleash a clean energy revolution,” said Markey. “I was able in 2022 in the climate bill, which President Biden signed, to include the funding for offshore wind off of Massachusetts. That’s 5,000 new megawatts of energy coming into a state that only uses 13,000 megawatts a day.”

Moulton said the first priority in bringing down energy costs is stopping the ongoing war in Iran along with reversing cuts President Donald Trump made to Massachusetts’ clean energy production.

“We clearly don’t have enough electricity, it’s a supply and demand problem,” said Moulton. “We’ve got to invest in next generation solutions. The future is fusion.”

Markey responded to Moulton by calling his statement “ridiculous,” saying the Green New Deal is the DNA of the energy bill which former President Joe Biden signed.

“That’s what unleashed this massive amount of renewable energy, wind and solar especially,” said Moulton. “That is the revolution I have been leading and I did because the young people especially in Massachusetts wanted that legislation passed.”

Markey added the Green New Deal included nuclear fusion, but that clean energy was “at the heart” of the bill.

“I respect your work Senator, and I supported it, but the reality today is that it hasn’t been enough because Massachusetts has twice the energy bills of the average American,” Moulton said.

Moulton said it’s time for a new generation of leadership to take new solutions forward.

Later in the debate, another resident asked what each candidate could do to thwart the “negative aspects” of the Trump administration.

“Impeach Trump,” said Markey. “He’s running a criminal enterprise…He’s been running an all you can eat corruption buffet for himself, for his family, for his cronies, for his corporations. He must be held accountable.”

Markey added he believes Trump is planning to “steal” the upcoming election.

“That’s what the Save America hack is all about – It’s about stealing the election this fall. It’s one after another impeachable offense,” said Markey. “We need to win the senate. We need to win the House.”

Moulton said his Serve America campaign helped flip certain seats in the House of Representatives from red to blue.

“Because we won the majority, we were able to impeach Donald Trump,” Moulton said. “But, it did not get confirmed in the Senate because there weren’t enough Senators fighting to win a majority in the Senate. That’s what happened in 2018 and that’s why we have a second term of Donald Trump and his criminal, fascist regime.”

On the topic of artificial intelligence, both candidates preached the importance of states and communities being able to set regulations, but Moulton said the 1996 Telecommunications Act, that Markey championed, opened the door to “big tech having no accountability and kids literally dying on the internet through social media.”

“I’m the author of the constitution for children’s protections online,” said Markey. “We need to protect against the mental health crisis in this country and I have been the leader throughout all of these decades in making sure all of these social media companies are held accountable. Those are my laws on the books.”

Moulton said these efforts haven’t been enough.

“Talk to any parent today in Massachusetts, ask me about how concerned I am for my five-year-old and seven-year-old to become teenagers and be exposed to social media…I think it’s great you’re trying to undo the mistakes of your 1996 bill, but it’s not enough.”

The two sides ended the debate by saying something they respect of their opposition. Markey thanked Moulton for his service in the military, and Moulton commended Markey for the time he has spent in government.