President Biden spoke by telephone to President Volodymyr Zelensky of Ukraine about the security package, which includes munitions, armored vehicles and other weapons.

Mr. Pollard, who gave a range of classified documents to Israel starting in 1984, recently completed his parole. His case was a longstanding irritant to American-Israeli ties.

A day after Iranian missiles fell on bases housing American troops in Iraq, the president said that no Americans were harmed and that Iran now “appears to be standing down.”