"the House of Representatives shall choose their Speaker and other Officers; and shall have the sole Power of Impeachment." That's the only guidance we get. It doesn't say [the Speaker] has to be a member, but I think it's just a presumption that it would be.
Trump would have to get virtually all the Republicans on board for that, and I could see getting half or two-thirds if some of them hold their nose-but not all. Some may not want to anger the Trump supporters in their districts, but there are 20-some Republicans from districts that actually voted for Biden.
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