Prior to this, Mensch was known for:
1. Being moderately successful 'chick lit' author Louise Bagshawe;
2. Becoming Conservative MP for Corby, then resigning after 2 years;
3. Attempting to start Twitter rival 'Menschn', whose website contained a critical security flaw which resulted in the front page being hacked to display a man stretching open his anus
I am not sure why she is afforded credibility as an accurate source of insight​ into the Trump administration.
For what it's worth, she was also a founder of Heat Street, the Murdoch-backed right-wing Huffington Post competitor that gets quite a few views on its own nowadays. She since moved on but one wonders what kind of connections Mensch developed while there. I'm not giving her Pulitzer credentials here but she didn't exactly come out of nowhere.
Also? She's clearly giving some of us what we want, if not what we really need (vetted information as opposed to scuttlebutt).