The president's top spokesman will be riding the bench for the rest of the week as he completes another round of Navy Reserve service.

White House Press Secretary Sean Spicer will not be at today's on-camera briefing - the first since the president fired his FBI director - a senior official told Politico.

His deputy, Sarah Huckabee Sanders, will field questions from the press, instead.

Spicer was last seen late Tuesday night at the White House taking incoming from reporters on James Comey.

The president's top spokesman will be riding the bench for the rest of the week as he completes another round of Navy Reserve service. White House Press Secretary Sean Spicer will not be at today's on-camera briefing - the first since the president fired his FBI director

Spicer was last seen late Tuesday night at the White House taking incoming from the press on James Comey

His deputy, Sarah Huckabee Sanders, will field questions from the press, instead. She's seen here on Morning Joe doing a warm up act on Comey

Huckabee Sanders regularly conducts briefings with the press on Air Force One and speaks on the president's behalf on television programs often.

She was on MSNBC just this morning fielding questions about Comey's abrupt firing in a warm up act to what is sure to be a white-knuckle White House press briefing at 1:30 Eastern.

Her first televised briefing with reporters was last Friday. The president was pleased with it, Politico's Tara Palmeri tweeted, opening the door for her to talk to reporters on camera again.

Spicer was reportedly on military duty then. He was spotted at the White House later in the day, however, and made an appearance Thursday in the Rose Garden for President Donald Trump's health care statement, another day he was said to be on duty.

Huckabee Sanders had done the briefing that day as well, off camera, after the president signed an order promoting religious freedom.

'Today, Sean is actually on Navy Reserve duty, so you guys are stuck with me - today and tomorrow,' she said at the top of her Thursday remarks. 'So brace yourselves for a fun 24 hours. I know we have a vote happening here very soon that we are all closely watching.'

Formerly the head spokesman and strategist the Republican National Committee, where he served under Trump's now-Chief of Staff Reince Priebus, Spicer has been a Navy reservist for 20 years. He assists with media operations.

His first reported day of duty since Trump took office on Jan. 20 was the Friday before Easter, on April 14.

Trump had departed for Florida a day prior to spend the Easter holiday with his family.

Including the two days last week, today is the fourth known day that reserve service has kept the president's press secretary out of commission.

He did respond to an email from DailyMail.com asking about his whereabouts and the timing of his service.

According to the Navy's website, reservists have make a 'commitment to serving a minimum of one weekend a month plus two weeks a year.'

'There are flexible drilling options that can enable service on weekdays or in an extended mission capacity to meet annual commitment requirements,' it says.

Assuming that no days were fulfilled in early January, he must complete 10 more days of service this year once his shift is finished Wednesday to remain in proper standing in the Navy.

He is reportedly knocking two more days off his tally this week on Thursday and Friday. At the end of next week he's expected to accompany the president on his eight-day trip abroad - the first foreign trip of Trump's presidency.