At some point Obama is going to be forced to defend himself...

and he shouldn't dignify Trump's craziness with a response.

We'll agree to disagree.

Sure, he could sue, but he won't. He sails above it all.

Never mud wrestle with a pig - you just get dirty, and the pig likes it. Trump wants him to engage, and for that reason alone he should not.

If he engages the minions become enraged. If he just lets that man do his work for him they might anyway but it might just push him over the edge seeing everyone else watch Obama sit back and not even give him the satisfaction.

Why join a dog that's chasing it's behind around in circles?

Every time Trump doubles down on his allegations of wiretapping, his credibility takes a hit, his approval ratings plummet further, and the illegitimacy of his Presidency is further underscored. Obama should say and do nothing and let the trainwreck that is the Trump administration continue to destroy itself. At this rate, Trump won't last for 18 months. If he's not impeached, he'll have a heart attack or stroke out given his very robust health and fitness (/sarcasm off), he'll give up the office "for health reasons" before getting impeached, or some right-wing wackadoo upset about a failed campaign promise will exercise his or her Second Amendment right.

They are already floating that "mental illness" idea. If he did responded now, it would turn narrative to Obama beating down (or lending credibility to) a clearly unstable loon.