Kanye West,a bitcoin-friendly Rapper and Brock Pierce chairman for Bitcoin Foundation have announced their candidature for US Presidential Elections 2020.
Will this magnify Digital Dollar and be a threat to Digital Yuan?
Let's start with West and Pierce allegedly running for presidency (it's not clear whether they will actually appear on ballot because for that they need to file proper documentation). I think that Pierce might boost Bitcoin popularity a bit, but these two have no chance of winning the election or even getting a significant amount of votes, so no long-term changes should be expected.
As for digital dollar and yuan, it doesn't have anything to do with it IMO. If one of the candidates miraculously became the president and was actively pushing for some crypto policy, I don't think they would try to make digital dollar that could undermine digital yuan because digital dollar stands against Bitcoin value of decentralization and unregulated price.