Yes, potentially this would turn another key against President Trump making his reelection extremely doubtful. That said, the third-party key last turned nearly 30 years ago and I find it doubtful that rep. Amash will be able to garner enough support to do so in 2020. We will all have to keep an eye on him as we move into summer and fall as the nation's attention centers more squarely on electoral politics. The keys do not speak to this specific point, but my own intuition is that the nomination of Joe Biden actually helps Amash. Had Sanders won the nomination, I believe many Republicans who don't like Trump would be hesitant to "waste" their vote on Amash knowing it would help a socialist. Biden is more palatable.