WASHINGTON (Reuters) - U.S. President Joe Biden proposed a summit meeting with Russian President Vladimir Putin during a telephone call on Tuesday in which he stressed the U.S. commitment to Ukraine's territorial integrity and voiced concern about a Russian military build-up in Crimea and on Ukraine's borders, the White House said.
"President Biden also made clear that the United States will act firmly in defense of its national interests in response to Russia's actions, such as cyber intrusions and election interference," the White House said in a brief statement.