Pence's office did not respond to a CNN request for comment.
Trump said Monday that he has not seen Pence since Miller tested positive on Friday, a fact that was underscored by the vice president's absence from Trump's news conference on Monday. Trump said he could confer with Pence by phone.
Pence said during a conversation with governors on Monday that he took extra precautions, noting that he was "in a room of his own" during a video conference while Dr. Deborah Birx was "in a situation room with some staff," according to audio of the conversation gained by CNN's Betsy Klein.
But in a difficult balance between taking necessary precautions and trying to avoid undercutting Trump's feedback, Pence is only taking half measures that fall under the administration's own guidelines.
Pence has appeared in the White House without a mask. And his presence there – even if he stays away from Trump – is in violation of the guidelines provided by the US Centers for Disease Control and Prevention, which provides advice to those who have had "close contact" (within six feet of someone for an extended period of time of the time) with someone who has tested positive to stay home for 14 days after the last interaction.
Officials have said that the president and others in the White House remain sensitive to steps that could undermine their message that the virus is waning and that the country is ready to reopen.
While some advisers raised the prospect of separating Trump and Pence long before White House staff tested positive, the option wasn't taken seriously until this week.