"Requiring both women and men to register for the selective service is a long overdue next step," read an amicus brief supported by General Michael Hayden.
"It is now time for the rest of the Republican leadership to put politics aside and insist that President Trump cease his dilatory and anti-democratic efforts," the former GOP officials wrote.
Former Republican National Committee Chairman Michael Steele is the latest to join the expanding bloc of high-profile GOP figures endorsing the Democratic nominee.
Michael Hayden said that while he disagreed with Democratic contender Joe Biden on some issues, Americans should vote for the former vice president and not Trump.
Michael Hayden sprang to the defense of retired Navy SEAL Admiral William McRaven, who Trump attacked on Sunday.
Michael Hayden shared a picture of Auschwitz alongside a comment about children being separated from their parents.
Sadiq Khan has called on the British government to cancel Trump's visit later this year.
The Republican Party front-runner is making Americans "less safe," Michael Hayden said.
Bill Harlow, along with former CIA Directors Michael Hayden and George Tenet, and Jose A. Rodriguez, Jr., the former head of the counterterrorism division, have teamed up for a media campaign.