A list of potential witnesses for state Sen. Vince Fumo filed in federal district court yesterday reads like an insiders’ guide to clout in Philadelphia over the past generation.

The list of almost 300 names includes not just political leaders and elected officials, but also many of the city’s top lawyers, lobbyists, labor leaders, business executives and the government workers who wield enormous power behind the scenes, day after day.

Fumo, 65, is scheduled to stand trial on Sept. 8 on charges that he bilked taxpayers and two nonprofits to the tune of more than $2 million and then orchestrated a cover-up to try to thwart a federal investigation. He has pleaded not guilty to all charges.