Democrats will hold their majority in the House and Nancy Pelosi will remain as Speaker, the party's campaign chief predicted Thursday.

Rep. Chris Van Hollen (Md.), chairman of the Democratic Congressional Campaign Committee (DCCC), reiterated his confidence in his party at a breakfast sponsored by the Christian Science Monitor.

“I'm confident that the day after the election the DCCC will be able to say that we did everything possible to hold onto the majority and that we will have," he said.

Republicans need a net gain of 39 seats to take control of the lower chamber. More than 100 House races are considered competitive this cycle.

Despite some members saying recently they wouldn’t vote for Speaker Nancy Pelosi (Calif.) to retain her job, Van Hollen said she "has an enormous reservoir of goodwill within the Democratic Caucus."

In an interview with Charlie Rose on Wednesday night, Pelosi said she has "every anticipation" she'll be Speaker next year.

"I have every anticipation that we'll come together in a similar format as we are now, with me as Speaker of the House," she said.

—Michael O’Brien contributed to this post.