LEWISTON (AP) — Republican Charlie Summers and independent Angus King continued to spar Wednesday during a sometimes testy debate in the U.S. Senate race, speaking over each other at one point and requiring the moderator to intervene.

“There they go again,” quipped Democrat Cynthia Dill.

Summers suggested that King’s support of natural gas was an opportunity to line his own pockets and said King vetoed an increase in Meals on Wheels funding while promoting laptop computers for public school students.

“You have to ask yourself, ‘What’s important?’ People being able to feed themselves or laptops?” Summers said.

King didn’t retreat from the first-in-thenation laptop program, which was his idea during his second term as governor, saying it’s giving students “the key and tool” for the 21st century. “It’s leading the country,” he said, adding that the program has attracted people from around the world to Maine to see it.

The forum sponsored by the Androscoggin County Chamber of Commerce came a day after a debate sponsored by the Portland Regional Chamber of Commerce. Independent candidates Steve Woods, Danny Dalton and Andrew Ian Dodge were not invited to either of the debates.

Summers continued to attack King over his fiscal management as governor. King, for his part, seemed shocked when Summers suggested he might profit from his support of natural gas, an apparent reference to King’s involvement in the wind industry after he finished his second term as governor.

The moderator had to intervene as they talked over each other.

Dill, for her part, attacked Summers for supporting nuclear power and for failing to acknowledge to her satisfaction a belief in human-caused climate change. She said “Republican extremists” were responsible for Washington gridlock and that a “progressive Democrat” is needed in the Senate.

Casting herself as a working mom who can best represent regular Mainers, she tossed a zinger at King and Summers as they went after each other.

“My two opponents should put aside their bickering about money,” Dill said. “It’s the one thing they both have in common.”