US administration officials have started an intensive campaign by making multiple visits to Capitol Hill to reassure the lawmakers, the Hill reported. Secretary of State John Kerry, Treasury Secretary Jack Lew, Energy Secretary Ernest Moniz and an unnamed “senior intelligence official” were expected to give separate classified briefings for all members of the House and Senate on Wednesday. Kerry, Lew and Moniz are also scheduled to testify before the Senate Foreign Relations Committee today, and then Kerry and Moniz will meet with House Democrats later in the day. The three secretaries will return to the House Foreign Affairs Committee next Tuesday. “That’s an indication that the administration continues to be serious about the responsibility we have to make sure members of Congress have the information they need to consider this agreement,” White House press secretary Josh Earnest told reporters.