Appearing on Current TV's "The War Room with Jennifer Granholm" on Wednesday night, Harvard professor Lawrence Lessig explained that the Supreme Court's allowance of unlimited, unattributed political spending by corporations will require a constitutional amendment to fix, but he doesn't believe the U.S. Congress will do it.

Unfortunately, Lessig said, the "cancer" of money and corruption in Washington has grown to such a degree that the Congress will refuse to make such a change, leaving it to the states to call for a constitutional convention to force that change -- something that has never been done before.

"We've been part of a process to get many people in many states to push their state legislatures to call for a convention, so that the convention can propose the changes that we as the American people need to consider," he said.

Lessig's new book, "Republic, Lost: How Money Corrupts Congress--and a Plan to Stop It," is available now.

This video was broadcast by Current TV on Wednesday, Feb. 1, 2012.