Daily politics briefing: August 21

The speaker expresses skepticism about the Prime Minister's address, noting surprise at the willingness of some to listen. They criticize the Prime Minister as the worst possible leader at a critical time, suggesting a loss of public trust across Britain.

What does the speaker mean by being 'burdened with the worst possible Prime Minister'?

What is the significance of the phrase 'worst possible time' in the context of the speaker's argument?