A memo sent to donors Saturday from the presidential campaign of Florida Gov. Ron DeSantis criticizes former President Donald Trump and dismisses other GOP rivals, even as his own polling numbers drop and remain stagnant. The memo, first obtained and reported on by CBS News, reassures donors and supporters of the campaign's confidence in the governor's standing ahead of next Wednesday's primary debate in California. It encourages them to "help echo the governor's message" on social media throughout the debate, and comes as the latest campaign finance quarter ends Sept. 30. DeSantis "is the only candidate that can beat both...