The Journal-Sentinel captures the dynamics of last night's debate pretty well. I am being pressured to go to the Farmer's Market so I will keep my own analysis short.
Barrett attacked Walker in almost every speaking opportunity last night, as the guy who is down in the polls probably should. In general, I thought his attacks were pointed and resonated with the audience, especially with regards to Walker's tax plan. Barrett's criticism of Walker's tax cuts was actually rooted in reality, which is a rare characteristic of any political attack. Moreover, his message that we "have to be straight with people" will resonate. Remember, polls don't show that people are head-over-heels for Republican economic policy; they're simply disillusioned with what they see as grandstanding politicking in government.
Walker was following the rule of the frontrunner by refraining from attacks in most instances. He was articulate, calm and got his message across. Interestingly, when the issue of health care came up, he emphasized his support for BadgerCare, and did not mention his previous statements in support of cutting back on the program.
Another aspect of the debate that corresponded to the underdog vs. frontrunner dynamic of the race was the Barrett campaign's rejection of WKOW's request to not use any footage from the debate in advertisements. Clearly, they're hoping the debates will reap good material for future attack ads.
On an unrelated note -- did anybody else hear the Spanish translator speaking over the candidates for about five minutes at the beginning of the debate? It was ridiculous!