Donald Trump’s media company stock has fallen again, this time down to $18. At the end of last week, DJT dropped below $20 after topping out at over $79 at one point. A year later, CNBC showed that the Truth Social parent company is suffering far worse than his presidential campaign numbers, which are down (43 percent) against Kamala Harris’ 48 percent, a USA TODAY/Suffolk Poll said. Trump is currently under a “lockup agreement” that prevents him and his investors from selling their stock until later this month. Under the agreement, insiders can’t sell their stock until a certain amount of tim…