Will President Trump have to divest himself of all businesses and investments prior to taking office?

It goes into Trust similar to a receivership but not punitively.

no as others already said he'll use blind trusts should he win in November, if he lives that long

No.... only put some of them into "blind trusts."

No.

No. At a minimum he has to disclose all his assets but he doesn't have to sell them. Most Presidents voluntarily put their assets into a blind trust while they're in office. The manager of the blind trust is free to buy or sell these assets without any input from the owner. This helps prevent a conflict of interest or the appearance of same. Interestingly, President Obama declined to do this.

Absolutely not, he will not be president.

No.

Google 'blind trust'.

Dick Cheney's Halliburton profited nicely from the (convenient) wars in Iraq and Afghanistan.

I can guarantee that a president Trump would funnel as much money into his own pockets as possible.

the only thing he'll be a president of is the drop the soap club