That's right. And the advantage to using Obama to make the threat/condition is that all of those

[TrollBuster9090]

spineless Democrats in the Senate, who are afraid to support union rights (although their never afraid to take union money during elections) wouldn't have to do anything. Obama himself would just have to say "Fine. If you're suddenly concerned about private sector trade unions, I'll be happy to sign the bill if you include an amendment that stipulates all work done on the pipeline must be done with unionized labor."

They'd never agree, of course. But the message would be sent that at least some Democrats support labor unions.