Boris to reshuffle cabinet after election victory

The transcript discusses the political landscape in the UK following a weekend of contrasting emotions for Labour and the Conservatives. Labour faces internal challenges as Jeremy Corbyn steps down, with a leadership contest on the horizon. There is pressure for Labour to elect a female leader and reform its manifesto. Meanwhile, Boris Johnson welcomes new MPs and prepares for legislative tasks, including a Brexit bill. He faces internal party challenges, needing to reshuffle his team and address the influence of the European Research Group.

How does the text describe Jacob Rees-Mogg's role in the Conservative Party?

What are the differing challenges faced by the two leaders mentioned in the text?