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Biden on Egypt: 'Pivotal moment in history'

Vice President Biden called what's happening in Egypt a "pivotal moment in history."

"We have said from the beginning, that future of Egypt will be determined by Egyptian people," Biden said at an event at the University of Louisville as part of the McConnell Center's spring lecture series.

Biden added that the U.S. stands for "a set of core principles," that the "transition must be an irreversible change ... toward democracy."

He said Republicans and Democrats, "even in this contentious political climate" have largely "spoken in one voice." Senate Minority Leader Mitch McConnell (R-KY) is with Biden at the event.

Biden said he "had planned on speaking more," but will wait for the president to give his remarks before saying more.

President Obama is expected to speak at 1:30 pm ET.

*** UPDATE *** NBC's Athena Jones reports the president's statement is now TBD and moved to the Grand Foyer.

*** UPDATE 2 *** NBC's Savannah Guthrie reports the president's statement will be at 3:00 pm ET.