UPDATE: There will no longer be a press briefing.
Trump claimed in a pair of bellicose, early-morning tweets that the results displayed from a search for "Trump News" on Google were "RIGGED" to favor negative stories.
"This is a very serious situation-will be addressed!" Trump warned.
Google pushed back hard in a statement later Tuesday morning. "Search is not used to set a political agenda and we don't bias our results toward any political ideology," a spokesperson said.
Sanders suggested to NBC News that she would address the issue during the press briefing that afternoon.