When Al Jazeera bought Current TV for $500 million in January 2013, former Vice President and Current co-founder Al Gore praised the deal. Both Al Jazeera, a network owned by Qatar's oil-rich royal family, and his far-left Current TV, Gore said, were founded "to give voice to those who are not typically heard; to speak truth to power; to provide independent and diverse points of view; and to tell the stories that no one else is telling."

Last week, Gore and Current TV shareholders sued Al Jazeera for fraud because, Gore attorney David Boies told reporters, "Al Jazeera America wants to give itself a discount on the purchase price that was agreed to nearly two years ago."

The dispute raises the question: Can oil and sanctimony mix?

After he lost the White House, Gore resumed his role as anti-global-warming activist in the 2006 film "An Inconvenient Truth." As a senator, Gore wrote the 1992 book "Earth in the Balance," in which he argued that global warming represented such a dire threat that only a "wrenching transformation of society" could spare the planet, such as a government mandate to eliminate the internal combustion engine in a 25-year period.

It's almost 25 years later, and the wrenching transformation instead seems to be that Gore and company cannot get enough Middle East oil money.

Liberal fans of Current TV, you got used.

Launched in 2005, Current TV provided safe landing for Democratic politicians. In the last few years, the network hired former Democratic Michigan Gov. Jennifer Granholm, former Democratic New York Gov. Eliot Spitzer and California's still Lt. Gov. Gavin Newsom, who apparently had no trouble juggling two jobs.

Alas, the viewing public did not tune in to watch Democratic politicians pontificate like politicians. About 31,000 viewers were tuning in daily.

Current TV nonetheless was worth millions because cable and satellite companies granted the network access to some 40 million households. And why was that? New York Times media reporter Brian Stelter credited Gore with pushing cable and satellite providers to include his untested network "through a combination of personal lobbying and arm-twisting of industry giants."

When cable bigs like Time Warner started to squawk about dropping the barely watched Current TV, Gore and company sold their lefty investment to Al Jazeera.

After the deal was announced, you might think that Gore would have chosen to modulate his criticism of the oil industry, given his personal debt to Qatar crude. Wrong. That month, Gore went on NBC's "Today" to promote his book, "The Future: Six Drivers of Global Change." In the book, Gore wrote, "Virtually every news and political commentary program on television is sponsored in part by oil, coal and gas companies" - like that was a bad thing.

Gore told host Matt Lauer it's wrong to criticize him because Al Jazeera was "a really distinguished and effective news-gathering organization."

Now Al Jazeera America has even fewer viewers - 17,000 prime time nightly - than Current TV. And lawyers are involved.

So Al Gore and company are suing Al Jazeera for fraud. But who gets to sue Al Gore?