Trump COVID-19 updates: Top Trump aide Stephen Miller tests positive

The vice commandant of the Coast Guard, Adm. Charles Ray, is under quarantine at home after testing positive for COVID-19 on Monday, according to a Coast Guard statement.

Ray had "mild symptoms over the weekend," the Coast Guard said.

The Coast Guard said it's "following established policies for COVID, per CDC guidelines, to include quarantine and contact tracing."

All the members of the Joint Chiefs of Staff are now quarantining at home after Ray tested positive, a U.S. official confirmed.

The official says this is being done as a precautionary move after Ray participated in a meeting with the chiefs either Friday or Monday. All have tested negative so far, according to a senior defense official. The only member of the Joint Chiefs who is not quarantining is the Marine Corps Commandant because he was traveling overseas at the time of the meetings.

A Department of Defense statement says, "Out of an abundance of caution, all potential close contacts from these meetings are self-quarantining and have been tested this morning. No Pentagon contacts have exhibited symptoms and we have no additional positive tests to report at this time.""

The Department of Defense added, "There is no change to the operational readiness or mission capability of the U.S. Armed Forces. Senior military leaders are able to remain fully mission capable and perform their duties from an alternative work location."

ABC News' Luis Martinez and Matt Seyler contributed to this report.

Amid questions about whether Vice President Mike Pence should be quarantining following his contact with Trump last week, Pence's physician issued a memorandum saying Pence "is not a close contact with any individuals who have tested positive for COVID-19, including President Donald J. Trump and senior members of the White House administration, according to the guidelines of the Centers for Disease Control (CDC)."

Pence's last known interaction with Trump was one week ago on Tuesday, ahead of the president's trip to Cleveland for the presidential debate.

Pence was also at the White House Rose Garden for Amy Coney Barrett's Supreme Court nomination; 11 people at that event have since tested positive for COVID-19.

Pence is now in Utah ahead of Wednesday night's vice presidential debate.

Pence's doctor said the vice president has had daily rapid tests and periodic PRC tests.

Pence and his wife tested negative for the coronavirus again on Tuesday morning, the vice president's office said.

ABC News’ Jordyn Phelps contributed to this report.

The president is reporting no symptoms from the coronavirus on Tuesday, Trump's physician, Dr. Sean Conley, said in a memorandum.

"This morning the President’s team of physicians met with him in the Residence. He had a restful first night at home, and today he reports no symptoms," the memo said. "Vital signs and physical exam remain stable, with an ambulatory oxygen saturation level of 95-97%. Overall he continues to do extremely well."

A White House valet who traveled with the president last week and often works in the Oval Office tested positive for COVID-19 this weekend, according to administration sources familiar with the matter.

Valets are employees who typically serve the president lunch or bring him drinks upon his request.

Earlier this year, another valet who works in the Oval Office also tested positive.

ABC News’ John Santucci contributed to this report.