Al GoreAl GoreTrump’s isolationism on full display at international climate talks Overnight Energy: Trump officials defend fossil fuels, nuclear at UN climate summit | Dems commit to Paris goals | Ex-EPA lawyers slam 'sue and settle' policy Al Gore: A new president in 2020 could keep US in Paris agreement MORE is back, big time. First he hired Keith Olbermann for his Current TV. Then he announced a major book deal, to be released in 2012, about the powerful changes affecting the U.S. and the world.

Last week Gore sent out a major fundraiser to the Democratic base, blasting House Republicans as extremist, reminiscent of the dark days of President George W. Bush (Gore's words) and deniers of science and climate change.

I predict the Gore fundraising letter raises a huge amount of money to help Democrats regain control of the House of Representatives.

For a much longer treatment, check out the piece I wrote that ran on the front page of The Daily Beast late Friday and Saturday.

Gore is back, coming on strong, raising big bucks for Democrats, attacking climate change deniers, and about to launch a new cable television challenge to Fox News, CNN and MSNBC from Keith Olbermann and others.