Guardian is the headline source, and it notes: "Former presidents traditionally receive some intelligence briefings even after they have left office." This next part got to me:
Trump announced his decision in a post saying: “There is no need for Joe Biden to continue receiving access to classified information. Therefore, we are immediately revoking Joe Biden’s security clearances, and stopping his daily intelligence briefings.
Mark Twain has said the editoral "we" is a pretentious usage, properly to be reserved only, "for true royalty, pregnant women, or people with tapeworms."