Kirk, Cornyn turn up the heat 10/19/2002 By TODD J. GILLMAN and GROMER JEFFERS JR. / The Dallas Morning News HOUSTON - After simmering in a slow-cooker for the first 20 minutes, Friday's first televised meeting between Democrat Senate nominee Ron Kirk and GOP rival John Cornyn warmed up into a tepid spat between the two button-down candidates. Democratic nominee Ron Kirk took frequent swipes at Mr. Cornyn over his contributions from the failed Enron Corp., and Mr. Cornyn peppered Mr. Kirk with criticisms of his opposition to President Bush's plan to alter Social Security, his acceptance of an...