The three major broadcast networks have pulled the plug on tonight's Democratic convention speech by Teresa Heinz Kerry - just two days after she went off the deep end by telling a report to "shove-it" as TV cameras rolled. ABC, NBC and CBS have decided to draw the curtain on Teresa's big night, cancelling live coverage of tonight's proceedings altogether, as fears mount among Democrats that Heinz Kerry a loose cannon who either bores audiences with her slow monotonous drone or shocks them by talking about her Botox injections and other indelicate topics. Political campaign consultants tend to fear personalities...