While Catt informed Munchetty there was growing speculation about Johnson replacing Truss, the divisive PM has yet to officially throw his hat into the ring.
However, many Conservative members have maintained he is the right man for the job after his victory in the 2019 election, despite his scandals over the past year.
Other candidates include Truss’s leadership race opponent Rishi Sunak, current Chancellor Jeremy Hunt and Leader of the House of Commons Penny Mordaunt.
BBC Breakfast airs weekdays from 6am on BBC One.
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