you ever wonder why this trial is happening now, not a couple years ago?

Each trial is unique, but there are two general reasons. First, in cases of large criminal networks, it’s typical to prosecute Lieutenants first and move up the chain, and that’s what has happened. That maximizes the ability of prosecutors to collect information before striking at the top. Second, Trump has no real defense on these cases, so his entire strategy has been delay, delay, delay. He wants to win the presidency and make the charges go away by whatever means he can muster.