Take it from those who have been there: Prison life is hard on people who need to be in control. Especially politicians accustomed to giving orders, cutting deals, spending millions - and getting their way. Former State Sen. Vincent J. Fumo is due to report to federal prison tomorrow, assigned to serve his 55-month sentence at a low-security institution in Ashland, Ky. His attorneys have fought that, wanting Fumo placed closer to family in Philadelphia. What's definite, experts say, is that prisons specialize in turning people like Fumo from kings to peasants. In free society, his dominion included four homes,...