Thirteen former senior intelligence officials, including 12 former CIA directors and deputy directors and one former director of national intelligence, have signed a letter of support for former CIA director John Brennan, calling the signal sent by the White House’s decision to strip him of his security clearance “inappropriate” and “deeply regrettable.”

“We feel compelled to respond in the wake of the ill-considered and unprecedented remarks and actions by the White House,” the senior officials wrote. “We know John to be an enormously talented, capable and patriotic individual who devoted his entire adult life to the service of this nation.”

The letter’s signees include former Directors of Central Intelligence Robert Gates, William Webster, George Tenet and Porter Goss; former CIA directors Gen. Michael Hayden, Leon Panetta and Gen. David Petraeus; former director of national intelligence James Clapper; and former deputy CIA directors John McLaughlin, Stephen Kappes, Avril Haines, David Cohen and Michael Morell, who is also a CBS News senior national security contributor.