Wow. Former UK Conservative MP Louise Mensch was just on MSNBC saying that the FBI obtained a FISA warrant to investigate a Russian bank doing business with Trump associates in Trump Tower, although there was no wiretapping. She stated point blank that if this is the investigation Trump tweeted about, he committed obstruction of justice by confirming the existence of a secret investigation.
Here's her original story, published in Heat Street the day before the election:
https://heatst.com/world/exclusive-fbi-granted-fisa-warrant-covering-trump-camps-ties-to-russia/Now, IIRC, she's a pretty outspoken political figure, so who knows if she has some other motivations at play here. But at the same time, she seems like the exact kind of person who would come to Trump's defense.
From her Wikipedia: