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In a letter to the Office of Personnel Management, the American Federation of Government Employees (AFGE), called an email demanding that employees list accomplishments over the previous week is “unlawful.”

The largest federal union wrote that the email is “nothing more than an irresponsible and sophomoric attempt to create confusion and bully the hard-working federal employees that serve our country.”

The letter continues to say that the email fails to give enough guidance on what information employees should avoid disclosing.

“Federal employees have a duty to ensure that sensitive information, data, and records are only used and disclosed for authorized purposes,” the letter says. “We believe that employees have no obligation to respond to this plainly unlawful email.”

“By allowing the unelected and unhinged Elon Musk to dictate OPM’s actions, you have demonstrated a lack of regard for the integrity of federal employees and their critical work,” the letter added.

-ABC News’ Selina Wang

Ed Martin, the interim U.S. attorney for Washington, D.C., was one of the few senior officials in government to encourage employees to respond to the Office of Personnel Management email from Elon Musk on Saturday that asked them what they had gotten done in the last week.

“DOGE and Elon are doing great work! Historic. We are happy to be participate [sic]," wrote Martin, who Trump nominated to fill the U.S. attorney position after picking him in an acting role.

Martin sent a follow up email on Sunday, which seemed to only add to the confusion about what employees should do in response to the OPM email.

Martin wrote:

"Yesterday, I responded to the HR email from OPM first — before anyone else in government. I did so to help you be encouraged. ...

“Let me clarify: we all will comply with this OPM request whether by replying or deciding not to reply.

“Again, should you reply, please do so carefully with respect to confidentiality and our duties. Please make a good faith effort to reply and list your activities (or not, as you prefer) and I will, as I mentioned, have your back regarding any confusion. We can do this.

“Don't let the perfect be the enemy of the good. This is a good opportunity for us all to continue to recognize and promote the importance of our work."

-ABC News’ Mike Levine

Air traffic controllers and Federal Aviation Administration employees also received emails Saturday from the Office of Personnel Management asking them to provide around five bullet points on work they accomplished in the previous week, the National Air Traffic Controllers Association (NATCA) and the Professional Aviation Safety Specialists (PASS) confirmed to ABC News.

The union also noted that the FAA's email security flagged the message as "suspicious."

A number of federal employees across multiple agencies received the Elon Musk-directed email from OPM that demanded employees detail their weekly accomplishments and that failing to reply would be considered a resignation.

In a statement to ABC News, NATCA said, "All those who rely on the NAS for travel and commerce understand the vital role our nation’s aviation safety professionals and air traffic controllers play in maintaining its safety and efficiency. Any unnecessary distractions compromise their ability to focus on their primary mission—safely directing aircraft carrying passengers and essential cargo throughout our airspace."

-ABC News’ Ayesha Ali

Steve Witkoff, Trump's special envoy to the Middle East, said that he’d be going to the region this week to negotiate the next phase of the Gaza ceasefire as the first phase nears its end.

“We do expect it, Jake, to go forward. We have to get an extension of phase one, and so I'll be going into the region this week, probably Wednesday, to negotiate that,” Witkoff told Jake Tapper during an interview on CNN’s “State of the Union.”

“And we're hopeful that we have the proper time to finish off, to begin Phase 2, and finish it off and get more hostages released, and move the discussion forward.”

Witkoff was asked if he believes Israeli Prime Minister Benjamin Netanyahu wants to move forward with the ceasefire, or, on the contrary, if he wants to resume the war to try to eliminate Hamas.

“I believe the prime minister is well-motivated. He wants to see hostages released, that's for sure. He also wants to protect the state of Israel, and so he's got a red line,” Witkoff said. “And he said what the red line is, and that is that Hamas cannot be involved in a governing body when this thing is resolved. And so I think he's trying to square the circle on both of those thing.”

-ABC News’ Kelsey Walsh