In the latest MAGA conspiracy accusation, the head of former President Donald Trump’s social media company blamed alleged market manipulation of its volatile stock price on President Joe Biden, shortly after alerting the Nasdaq to recent trading patterns. Trump Media & Technology Group CEO Devin Nunes told Newsmax on Friday: “We will do whatever we have to do to defend our retail investors” in the company, which has shed about half its value since going public on March 26. “And what’s at the heart of all of this, Chris? Remember, at the beginning of the week, Joe Biden mentioned Truth Social a…