He's not triangulating -- he's tacking.
A course of action meant to minimize opposition to the attainment of a goal.
As Barone points out, Bush has made no bones about political surrender to popular spending programs. Neither the Education bill nor the Prescription Drugs are any good at all. And it looks like he will be forced to concentrate the rest of his presidency on the terror war. A landslide in 2004 would help W get some help in Congress to make some progress domestically.