Trump Tower was wiretapped when they were investigating the Russian money laundering in unit 63A in Trump tower where they ended up arresting 13 individuals on federal charges for money laundering.
This was common knowledge years ago
Of course if you're a Russian foreign troll you probably don't know the intricacies of American news and what's public knowledge here.
Here's a story about a 2 years ago
FBI eavesdropped on Russian money-laundering ring that operated out of iconic skyscraper for two years