The last bullet I could've better stated as "work together as much as possible to do what both parties believe is best for the country". I'm not saying the opposition party should support all the policies of pres, but they should support the ones that they believe are good. It is good for the admin to have input from leaders of economy, and the dems believe that.

Since the Democrats generally do not believe that the purpose of these meetings is to provide the President with operating advice for the country or the economy, it is not incumbent on them to support the meetings. And so, they do not.