WASHINGTON—All options are on the table in how to respond to Russia’s “large and unusual” troop buildup near Ukraine’s border, and the NATO alliance will decide on the next move following consultations next week, the State Department’s top U.S. diplomat for European affairs said on Friday. “As you can appreciate, all options are on the table and there’s a toolkit that includes a whole range of options,” Assistant Secretary of State for European and Eurasian Affairs Karen Donfried told reporters in a telephone briefing. U.S. President Joe Biden said he was concerned about the situation in Ukraine, repeated Washington’s support for Ukraine’s territorial integrity, and added that he will “in all probability” speak with his Ukrainian and Russian counterparts Volodymyr Zelenskiy and Vladimir Putin. The comments came as U.S. Secretary of State Antony Blinken is heading to Latvia and Sweden next week to attend meetings of NATO and the Organization …