is the speaker of the house part of the cabinet
Cabinet of the United States The Cabinet includes the Vice President and the heads of 15 executive departments, listed here according to their order of succession to the Presidency. These 15 positions are the core "cabinet member" seats, as distinct from other Cabinet-level seats for other various top level White House staffers and heads of other government agencies, none of whom are in the presidential line of succession and not all of whom are Officers of the United States.[8] Note that the Speaker of the House and the President pro tempore of the Senate follow the Vice President and precede the Secretary of State in the order of succession, but both are in the legislative branch and are not part of the Cabinet.
Speaker of the United States House of Representatives The House of Representatives elects the Speaker of the House on the first day of every new Congress and in the event of the death, resignation or removal from the Chair of an incumbent Speaker.[5] The Clerk of the House of Representatives requests nominations: there are normally two, one from each major party (each party having previously met to decide on its nominee). The Clerk then calls the roll of the Representatives, each Representative indicating the surname of the candidate the Representative is supporting. Representatives are not restricted to voting for one of the nominated candidates and may vote for any person, even for someone who is not a member of the House at all. They may also abstain by voting "present".[6]