Massachusetts’ longtime secretary of state has resisted calls from his opponents to debate.

Bill Galvin is a heavy favorite to win a sixth four-year term. But he does face two opponents this November: the Green-Rainbow Party’s Danny Factor, and Republican Dave D’Arcangelo.

D’Arcangelo says they’ve debated a couple times, but without Galvin.

“If he’s got such a great record and he wants to talk about all these things, let’s debate,” D’Arcangelo said Wednesday. “Why is he ducking me?”

Among the issues D’Arcangelo wants to quiz Galvin on: a Boston Globe report that his office awarded a no-bid contract to a Washington, D.C., firm to produce public service announcements — a firm that’s also worked for his campaign. Galvin told the Globe the firm’s price is competitive and their work is good.

As for the debates, Galvin’s campaign has not answered multiple requests for comment.

Outgoing Gov. Deval Patrick says debates are an important part of the election process.

“Debates are – I mean, I can say this now [that] I’m not a candidate – a pain in the neck,” Patrick told reporters during a visit to Springfield Tuesday. “But a good part of the process and an important part of the process.”

New England Public Radio’s Henry Epp contributed.