3) Remains to be seen. From what I've read, carried interest is about $1.2 billion annually. So, it's not a big number at all. The sports owner issue is even more nebulous, probably driven by Trump's anti-NFL animus from back in the day, lol.
Tax tangent: The primary tax loophole for sports team owners is that the majority of the team's assets are depreciable assets - stadiums, vehicles, training equipment, etc. So the team assets are losing value on paper offsetting taxable revenue.
Additionally, some owners are taking a deduction on player salaries and a deduction on having purchased the player contracts. There's more complexity here but it revolves around owning the contracts as a separate asset from the operating expenses of paying salaries. Essentially, paying Lebron to play basketball is an operating expense and deductible. But Lebron's contract is an asset with depreciable value because Lebron, the athlete, is worth less money every year (because of age, injury risk, etc.). And that too is deductible, lol.