Mr Acosta, who has been one of the staunchest press corps critics of the White House's decision to bar cameras from the press briefings, pushed back in a tense exchange between the two.
The White House's continued refusal to answer reporters' questions on camera had journalists steamed on Monday at an off-camera briefing where only audio was allowed and was barred from broadcast until the conclusion of the session.
"There's no camera on Jim", Spicer said.
Spicer said "some days we'll have them" on camera, some days not.
"It's a legitimate question, Sean".
Spicer replied that he wanted to let the "president's voice carry the day", without competition from the briefings, and that "some days we'll have [televised briefings], some days we won't".
Appearing on CNN with host Ana Cabrera after the briefing, Acosta said the White House hasn't taken a question from CNN for several weeks, calling the off-camera briefings an "erosion" of traditions in Washington.
Acosta interrupted again: "Why aren't the cameras on, Sean?" "My sense is that we are going to have to engage in a sustained, vocal protest of these restrictions so this does not become the new normal", he said. He - and deputy press secretary Sarah Huckabee Sanders - tend to be extremely terse when answering questions and, when asked about President Trump's view on a particular issue, often insist they simply haven't asked the president.
Many media pundits and White House reporters themselves slammed the White House communications department for avoiding the daily televised press briefings, which yielded illuminating and occasionally embarrassing information about President Donald Trump and his administration.
White House press secretary Sean Spicer on Sunday dismissed criticism of the Trump administration's increasing lack of on-camera press briefings.
"This is a new thing that this White House is doing to us here at CNN and to a couple of other news outlets as well". "We are not satisfied with the current state of play, and we will work hard to change it". Television networks were allowed to record audio, but not air it live. Trump was not scheduled to take questions during the garden appearance with Modi.