According to crypto prediction market platform Polymarket, the odds of Vice President Kamala Harris becoming this year's Democratic presidential nominee rose to 31 percent on Tuesday, up sharply from 7 percent earlier. Similarly, the price of the Harris "Yes" contract on PredictIt doubled to 35 cents. While Joe Biden remains the presumptive Democratic nominee, many supporters are calling for him to step aside and want Harris to take over. South Carolina Rep. James Clyburn and former Congressman Tim Ryan expressed their support for Harris in the media. In addition, Tuesday was the fifth most traded day in Polymarket's four-year history, with $5.70 million traded. Meanwhile, the price of KAMA, a meme coin named after Harris, doubled to $0.007815 in 24 hours.