YANKTON, S.D.(WNAX)- American diplomacy is in overdrive today, attempting to head off a threatened invasion of Ukraine by Russian military forces.

South Dakota Congressman Dusty Johnson says Russian leader Vladimir Putin has to be stopped.

Johnson says economic sanctions have to be led by European allies.

Johnson says any impacts to the US from a Russian invasion would be short lived.

President Biden warned again that an invasion could happen “in a matter of days.”