“It was done in retaliation for his challenging questions at today’s press conference,” CNN said Wednesday in a tweeted statement.
During the exchange, Trump called Acosta a “rude, terrible person” because the reporter refused to sit down after asking the president about a racist anti-immigration ad he promoted ahead of Tuesday’s midterm elections.
“In an explanation, Press Secretary Sarah Sanders lied. She provided fraudulent accusations and cited an incident that never happened,” CNN added in its statement. “This unprecedented decision is a threat to our democracy and the country deserves better.”
Trump has repeatedly criticized CNN and called it “fake news.”
Source : https://www.huffingtonpost.com/entry/sarah-huckabee-sanders-jim-acosta-ban-white-house_us_5be46f2de4b0769d24cabd4c