Don't stop reading the article too early. A bit over halfway through—

". . . .the best immediate solution to advance the progressive agenda is for progressives to join and take back the Democratic Party, in the same way conservatives seized control of the Republican Party.
I called the Democratic headquarters in my home state of Vermont.
"Sign me up!" I said to the startled young man who answered the phone.
"What?" he said, taken aback by my enthusiasm.
"I'm mad as hell and I'm not going to take it anymore," I said, standing and waving my arm as I talked on the phone. "We have to stop the right-wingers from ripping up our constitution, despoiling our earth, and turning America into a fascist state! Sign me up!"
"Are you a Democrat?" he said.
"Can I be a progressive Democrat?"
"Sure!" he said.
"Then I'm also a Democrat now!"
He chuckled, and said. "We're getting a lot of calls like this."

Then Hartmann goes on from there.

Don Firth