DiCara called the newly-redesigned Fifth Congressional District a “safe, Democratic district.”

He also downplayed the argument that Markey’s many years in the House have left him burnt out, instead pointing to his expertise on global warming and the telecommunications industry.

“He is full of ideas, full of energy,” he said. “[One of Markey’s races] hasn’t been close since the first time he ran.”

Likewise, Democratic political strategist Mary Anne Marsh said that “there’s no way Markey is going to lose.”

“People always underestimate Ed Markey when he comes to his races,” she said. “He works the district pretty hard.”

The area, previously represented by Congressman Michael Capuano as part of the Eighth Congressional District, was redistricted earlier this year into a new Fifth District. Capuano, who is unopposed, will now represent the rest of Cambridge in the newly formed Seventh District.

—Staff writer Nicholas D. Fandos contributed to the reporting of this article.

—Staff writer Nikita Kansra can be reached at nkansra01@college.harvard.edu.