I knew he was a devoutly religious man who was angry about what I had done, and he had carefully avoided saying that I should be impeached.

One Republican committee chairman was plainly distraught when he told a White House aide that he didn' t want to vote for impeachment but he would lose his chairmanship if he voted against it.

It wasn't a debate over a bill, but the impeachment trial of President Andrew Johnson that was held in the Senate in 1868 was as dramatic as any past or future arguments over legislation.

One Republican senator who was opposed to impeachment kept us informed of what was going on among his colleagues.

"They have played a very critical role in this impeachment process and building pressure," Rehman said.