Well, Biden doesn't seem to agree with you
Nice cherry pick. The president is likely referring to sanctions.
Your link doesn't support your claim that this is economically motivated.
"If Russia invades, that means tanks or troops crossing the -- the border of Ukraine again, then there will be -- there will be no longer a Nord Stream 2,"
Even if it were a threat to destroy the pipeline if Russia invaded, Russia invaded. So now what would you expect to happen?
2. The United States is already at max capacity for its export capabilities. There is no incremental supply to satisfy demand.
3. Destroying foreign supply when demand can't be met only serves to destroy demand because it forces the market to move to alternatives (case in point: OPEC and how they try to not let oil prices get too high or low).
It's ludicrous to suggest the US has a significant economic interest in executing some sort of industrial sabotage on NS1/2.