Yes, he should be investigated:
There have been weak presidents, deluded presidents, and harmful presidents before him, but never has there been anyone as sinister or questionable as Obama, not excluding even the malefic Jimmy Carter or the sleazy Bill Clinton. What J. R. Dunn writing in American Thinker has said of Hillary, “the most repellent and corrupt American presidential candidate since Aaron Burr,” is equally true, in my estimation, of Barack Obama. Meanwhile, it is Trump who faces a barrage of threats, calls for impeachment and acts of disobedience that would have been more explicable if levied against Obama for his historic deceptions and malfeasances. Under the pestilential reign of Obama, and indeed years of Democratic incumbency, the shining city on the hill has become a murky city in the swamp.
The trouble with Barry is not only that he refuses to go away, materializing like Harry where he has no business being, or that he enjoys, à la Hitchcock, making cameo appearances in whatever political film he happens to be directing at the moment. All this would be perfectly acceptable, even agreeable, were he a benign presence or if he had Hitchcock’s talent for deadpan humor and high entertainment rather than a penchant for malice and misconduct.
He seems determined to outdo Jimmy Carter as our worst former President.