The approval marks a key development in the merger that will reshape media, allowing the continue of the takeover of the Hollywood studio, which owns CNN and HBO.
The proposed "anti-weaponisation" fund was announced to settle a lawsuit by Trump against the Internal Revenue Service over the leak of his tax returns.
The US president's reaction came as Iranian media reported purported details from the alleged agreement that included much of what Tehran has been demanding and the US rejecting.
SpaceX founder Elon Musk said he gave the company "less than a 10% chance of succeeding at all" when it first started, and it is now going public "with the largest IPO ever".