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- President Joe Biden warned Russia before departing for Ukraine on Monday, the White House said.
- National security advisor Jake Sullivan said Moscow was given "hours" notice before the surprise visit.
- Biden's unannounced trip comes just before the one-year anniversary of Russia's unprovoked invasion of Ukraine.
The White House gave Russia "hours" notice that President Biden was visiting Ukraine on Monday, according to national security advisor Jake Sullivan.
Sullivan told reporters that Moscow was notified about Biden's plans just before he left. The heads-up was for "de-confliction purposes," Sullivan said, though he didn't specify who at the Kremlin was contacted or how.