I examined Rasmussen's tracking poll data a few weeks ago.
A few thing have changed over the last couple weeks.
For one Huckabee's rise from 5% to 13% pulled mostly from Fred Thompson and Mitt Romney.
Huckabee's rise from 13% to 23% pulled mostly from Fred Thompson and Rudy Giuliani. That's right the majority of Huckabee's support could be linked to daily drops in Giuliani's support.

