FILE - In this Monday, Aug. 26, 2019 file photo, Britain's Prime Minister Boris Johnson gestures during his final press conference at the G7 summit  in Biarritz, southwestern France. Boris Johnson is getting tough with members of his Conservative Party who oppose his Brexit plans at the start of what promises to be a momentous week in British politics.
The so-called "rebels" are being warned Monday Sept. 2, 2019, that they will be expelled from the party if they take part in efforts led by opposition parties in Parliament meant to block a departure from the European Union without a deal. (AP Photo/Francois Mori, File)
Boris Johnson has threatened to punish members of his own party who oppose his Brexit plans. AP

Brexit: Tory MPs warned against mutiny amid election speculation