How about that time when Ed Henry walked out of a press briefing by Jay Carney because he refused to call on any TV reporters?
Or this:
“It looks like Fox won the first major skirmish after being denied entrance to a White House press pool event.”
https://grandrants.wordpress.com/2009/10/23/fox-news-vs-white-house-fox-1-wh-0/
If I recall my presidential history, reporters have often been kept off the candidate’s or president’s plane, etc. Not really uncommon.