Former Sen. John E. Sununu’s comeback attempt in New Hampshire has Democrats there warning about a tougher-than-expected Senate race that could complicate the party’s effort to flip control of the chamber next year.

Sununu — a Republican who served one Senate term two decades ago and whose younger brother, Chris, was more recently the state’s popular four-term governor — jumped into the race last month.

The GOP establishment quickly rallied around Sununu in a primary that also includes Scott Brown, who served as an ambassador in President Donald Trump’s first term and as a senator from neighboring Massachusetts in the early 2010s.

Democrats are likely to counter with Rep. Chris Pappas for a seat that is up for grabs next year after Democratic incumbent Jeanne Shaheen, who beat Sununu

See Full Page