Here's how I see it;
Schumer comes to Manchin and says.. "We want to spend 700 billion more dollars, so we will need your support.
Manchin says... "I can't approve more spending like that, since it comes right out of the American people's bank accounts and 401K accounts. I woukd have to vote against any more such spending."
Schumer says..."I got it figured, first we ask for $2 trillion..you be a hero to the folks at home and vote it down.
Then I bring up the $700 billion we actually want, and you can vote for the "smaller" package.
When push comes to shove...he's a Democrat !