With Obama, the people holding secret meetings and plotting to thwart his agenda were elected Republicans in the House and in the Senate.
This is the Democracy Alliance — not the same thing. And the article mentions only three elected Democrats scheduled to make “appearances”. This is hardly a secret Congressional strategy session. Compare this to the list of attendees at this meeting — http://www.huffingtonpost.com/2012/04/25/robert-draper-anti-obama-campaign_n_1452899.html. That’s all the Republican leadership except McConnell and Boehner.
Furthermore, the goal here is to mitigate the possibility of Trump undoing progress the Democrats have made on certain issues, such as dealing with climate change. It’s not the same thing as “we must stop Trump from getting anything accomplished because we hate him and we’re sore losers” — which was the objective of the Republicans in 2009. Democrats know they don’t have to help Trump over a cliff — he’s capable of screwing himself up all on his own. They just want to keep him from destroying their accomplishments in the process.