Except the logical leaps between "Obama wins reelection" and "I can't profitably employ you" rely on multiple steps of pure conjecture...steps that are easy for a rabid partisan to make, but are not particularly rational from a business perspective. I'm not buying the "he's just passing along information" thing, because the cause (Obama winning reelection) is so far removed from the effect (firing his employees) that it's pure nonsense. He's assuming that he can predict with 100% certainty how a second Obama term would play out, right down to how it would impact his own business.
I don't know what (if any) policies Obama has proposed that he's so pissed off about, but let's say that there is a Policy X in Obama's campaign platform that this guy thinks will hurt his business. What are the other possibilities here, if Obama gets reelected? 1) Obama wasn't that serious about Policy X anyway, and never bothers to implement it; 2) Obama wants to pass Policy X, but Congress rejects it; 3) Obama and Congress both want to pass Policy X, but it gets gummed up for procedural reasons; 4) Obama and Congress both want to pass Policy X, but just never get around to it; 5) Obama and Congress actually pass Policy X, and it doesn't have as big of an impact on this guy's business as he thought it would; 6) Obama and Congress actually pass Policy X and it does hurt this guy's business, but some other factor offsets the loss.
There are other possibilities too, but the bottom line is that he most likely has no idea what the next four years will bring for his business, and the identity of the president is pretty far down the list of factors that could hurt a person's business. If we take the charitable view of his actions, he's just a blowhard who is blowing off steam. The less charitable view is that he's intentionally trying to manipulate his employees to voting for the person he wants them to.