House party
Fleetwood was a strong and unswerving follower of Cromwell's policy. He supported Cromwell's assumption of the position of Lord Protector and his dismissal of the parliaments. In December 1654 he became a member of the council, and after his return to England in 1655 was appointed one of the administrative major-generals. He approved of the Humble Petition and Advice, only objecting to the conferring of the title of "king" on Cromwell; became a member of the new House of Lords; and supported ardently Cromwell's foreign policy in Europe, based on religious divisions, and his defence of the Protestants persecuted abroad. He was therefore, on Cromwell's death, naturally regarded as a likely successor, and it is said that Cromwell had in fact so nominated him. He, however, gave his support to Richard Cromwell's assumption of office, but allowed subsequently, if he did not instigate, petitions from the army demanding its independence, and finally (with the aid of the other officers in the Wallingford House party) compelled Richard by force to dissolve the Third Protectorate Parliament.