Twenty-two US senators have introduced into the 113th Congress, Second Session, a bill, S.2277, "To prevent further Russian aggression toward Ukraine and other sovereign states in Europe and Eurasia, and for other purposes." https://beta.congress.gov/113/bills/s2277/BILLS-113s2277is.pdf The bill is before the Committee on Foreign Relations.
Note that prior to any evidence of any Russian aggression, there are already 22 senators lined up in behalf of preventing further Russian aggression.
Accompanying this preparatory propaganda move to create a framework for war, hot or cold with Russia, NATO commander General Philip Breedlove announced his plan for a deployment of massive military means in Eastern Europe that would permit lightening responses against Russia in order to protect Europe from Russian aggression.
There we have it again: Russian Aggression. Repeat it enough and it becomes real.