Former San Francisco Mayor and California Assembly Speaker Willie Brown is a veteran politician who ought to know trouble when he sees it. And in today's San Francisco Chronicle, he sees trouble -- big trouble, for the Democrats -- in the form of Sarah Palin:

The Democrats are in trouble. Sarah Palin has totally changed the dynamics of this campaign.

Period.

Palin's speech to the GOP National Convention on Wednesday has set it up so that the Republicans are now on offense and Democrats are on defense. And we don't do well on defense.

Suddenly, Palin and John McCain are the mavericks and Barack Obama and Joe Biden are the status quo, in a year when you don't want to be seen as defending the status quo.

From taxes to oil drilling, Democrats are now going to have to start explaining their positions.

Whenever you start having to explain things, you're on defense.

I actually went back and watched Palin's speech a second time. I didn't go to sleep until 1:30 a.m. I had to make sure I got the lines right.

Her timing was exquisite. She didn't linger with applause, but instead launched into line after line of attack, slipping the knives in with every smile and joke.

And she delivered it like she was just BS-ing on the street with the meter maid.

She didn't have to prove she was "of the people." She really is the people.

(Via Jonah Goldberg, who doesn't seem frightened.)