Secretary of State John Kerry will brief Congress this week on the nuclear deal with Iran in an effort to build support for its passage.

House Minority Leader Nancy Pelosi, D-Calif., told fellow Democrats in a letter Monday that Kerry will meet privately with lawmakers on Wednesday to discuss the deal, which requires congressional approval. And on Thursday, Kerry, Energy Secretary Ernest Moniz and Treasury Secretary Jack Lew will come to Capitol Hill to address lawmakers on the matter, Pelosi said.

Kerry will brief both Democrats and Republicans, but will also have a separate meeting just with Democrats.

Pelosi told lawmakers she backs the deal and wants her fellow Democrats to support it, too. In her letter, she referenced a poll showing strong support for the deal. On Monday, a Washington Post-ABC News poll showing the public favors it by a 2-1 margin, although only 35 percent said they believed the deal would be effective in deterring Iran from securing a nuclear weapon.

Monday was the start of a 60-day review period for Congress to analyze the deal. Members are expected to vote on a resolution of disapproval for the deal in early September, although the deal is eventually expected to be deemed as approved, as Congress is unlikely at this point to be in a position to override Obama's veto of that resolution.

Pelosi praised the deal, calling it "a major accomplishment." She also noted increasing support for the agreement from national security experts.