Winning odds for Vice President Kamala Harris rose to 37% after a Polymarket user placed a $2 million bet on her.The Trump-Harris battle now has a 26% gap, with Trump's winning odds at 63%.The Polymarket user, Ly67890, is now the largest holder of Kamala's 'Yes' Shares.Some of Kamala's supporters question the credibility of polls on Polymarket, claiming that most users on the platform are foreigners.