In a primetime address Thursday, President Biden warned Donald Trump and his radical supporters are threatening the foundations of the republic. Biden said, “Too much of what’s happening in our country today is not normal,” and that Republicans present a “clear and present danger to our democracy,” referring to Trump’s campaign slogan of “Make America Great Again.” We speak with Nancy MacLean, author and Duke University historian, who says Biden’s speech was a “wake-up call” for the nation and mainstream media. “He was absolutely right, in my opinion, that the Trump wing of the party and Republicans have jumped the rails of constitutional democracy, of the factual universe and of representative democracy.”