WESLEY CLARK has told associates that he will decide in the next few weeks whether to declare for president. If he does, it would transform the race. Call me star-struck, but he'd instantly be among the top tier. Clark, in case you've been on sabbatical in New Zealand, is all over the talk shows. He's the former NATO supreme commander who headed operations in Kosovo, a Rhodes Scholar who graduated first in his class at West Point, and a Vietnam vet with several combat medals including a purple heart. He has been a tough critic of Bush's foreign policy. His domestic positions are not as fully fashioned, but he'd repeal Bush's tax cuts and revisit the so-called Patriot Act.