Clark told Sky News, "It's evident that if you have the disruption that comes from a no-deal Brexit there will be people that will lose their jobs". Though she didn't mention Johnson by name, he has made a career out of being the biggest personality in the room.
"There is a real difference".
The victor will be chosen by members of the Conservative Party.
The veteran MEP noted that Theresa May still has a couple of weeks left before her premiership is expected to terminate, and that she could "as a parting gift, still appoint a new ambassador who might be perfectly terrible like Sir Kim Darroch", but that if the decision does fall to Mr Johnson, and Mr Johnson does make the offer, he might not be able to accept it.
Ms Rudd added: "I'm backing Jeremy Hunt because I think he's the best person to be able to get the best deal amended from the European Union and be able to sell that in Parliament to people".
Clark's comments came as peers launched a fresh bid on Friday to block any plans by a future Conservative prime minister to suspend or prorogue parliament in order to force through a no-deal exit from the EU.
She added it's unlikely that her successor will negotiate further Brexit concessions from the EU.
The following day, July 24, Theresa May will speak at her final Prime Minister's Questions before heading to Buckingham Palace to resign as Prime Minister to the Queen.
May, who will return to Parliament as a lawmaker, also took issue with those who chided her for becoming emotional as she announced her departure from the post.
"If a male Prime Minister's voice had broken up, it would have been said "what great patriotism, they really love their country".
Britain's Conservative Party leadership candidate Boris Johnson during a visit to the port of Dover, southeast England, while on the campaign trail, Thursday July 11, 2019.
"The idea of proroguing parliament is utterly and totally unacceptable from any British parliamentarian or democrat", said Major, who is backing Johnson's rival Jeremy Hunt for the leadership but said he was speaking in a personal capacity.
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