Carter wasn't the only critic of Trump's announcement.
"We have conversations back and forth all the time with the White House in a variety of channels and those conversations are starting to happen on the issue", Navy Captain Jeff Davis said - the key phrase there being "starting to happen".
Dunford began his memo to the nation's military leaders: "I know there are questions about yesterday's announcement".
"I'm going to remain hopeful", he said.
The Department of Defense continues to await President Donald Trump's official order barring transgender service members from the US military, Pentagon Spokesman Capt. Jeff Davis told reporters Monday. It is estimated that around 200 personnel serving in the Canadian Armed Forces identify as transgender.
Since that time, the senators say, there have been no reports of problems stemming from having to accommodate transgender service members. Amanda Brewer of Virginia is anxious that the military's health care system will cut coverage of her daughter's treatment, which was included only after the policy welcoming transgender troops was announced past year.
The announcement sparked outrage in the USA, with a number of countries across the globe also condemning the move, and now the Irish Defence Forces have responded to Trump's ban with a heartwarming message of acceptance and support. Trans people serve in the military at higher rates than cis people do, and that is only counting the trans people we know about who transitioned after they got out.
Evangelical author and public relations consultant Johnnie Moore, who was present at the meeting, said the policy on transgender people serving in the military had not been on the agenda for the meeting, but it was one of many topics that came out throughout the day.
What about the "disruption" supposedly caused by allowing openly transgender men and women to serve?
Transgender costs add up to only around $2.4 million to $8.4 million.
During his election campaign, Trump occasionally presented himself as a potential ally of gays and lesbians, promising to be a "real friend" of their community. Unit cohesion would be undermined.
Specifically, "after consultation with my Generals and military experts". Speaking at a Texas HVAC manufacturing plant on Friday, the former Lone Star State governor told reporters, "I totally support the president in his decision", the Texas Tribune reports.
Trump's tweets did not include any reference to legislation to outline or enforce the ban. Earlier this month, the Republican-led House rejected a proposal to end the Obama-era practice of requiring the Pentagon to pay such costs.