There are growing calls to invoke the 25th Amendment, reportedly in response to a letter from Trump, with some sources mentioning a letter related to Norway and others referencing a statement about Iran or a letter about Greenland. The 25th Amendment is being discussed as a potential means to remove Trump from office, with some Democrats and at least one conservative magazine co-founder supporting its use. The amendment's process and potential use in this context are being debated and explained by various outlets.