BURLINGTON, Vt. (AP) – Vermont Sen. Bernie Sanders is kicking off his longshot presidential campaign with a pitch to liberals in the Democratic Party.

He’s calling for a “political revolution” to transform the nation’s economy and politics.

Sanders is vowing to make income inequality, campaign finance reform and climate change leading issues as he formally opens his challenge to Democratic front-runner Hillary Rodham Clinton in Burlington, Vermont.

The former Burlington mayor says there is “something profoundly wrong” when so much of the nation’s income goes to the top 1 percent of all earners.

In his planned remarks Tuesday, the self-described democratic socialist says “this type of rigged economy is not what America is supposed to be about.”