However, the move appeared to backfire on Johnson by galvanising opposition MPs and Conservative rebels into passing legislation forcing him to seek a Brexit delay next month if he has not reached a deal with the EU.
That law is expected to receive royal assent on Monday.
Johnson responded to the Tory rebellion by kicking 21 MPs out of the party -- including Winston Churchill's grandson -- and barring them from standing as Conservatives in the next election.
The hardline response prompted a fresh revolt, with several ministers -- including Works and Pensions Secretary Amber Rudd -- quitting the government and the party.
He added it would take place regardless of the outcome of a government-led vote on holding a snap election next month.