The usual expression is, "If you want X, I'm your guy!" How does a woman say this? "I'm your woman" won't work; "woman" is just standard English, while "guy" is slang. The true counterpart to "guy" is "gal" (as in the musical) but "gal" now sounds Western, rural, and archaic.
To say "I'm your girl" is not the same as calling an adult female a "girl." That usage, in turn, sprang from a sense that "woman" was a uncomplimentary word. Better to use either "lady" or "girl."
While boys have always loved to be called "men" when they were still boys ("Son, you're a man now"), pre-feminist women wanted to remain "girls" as long as possible. Girl suggested youth and sexual attractiveness. The feminist movement called attention to this double standard.
Since class and race are linked, and even confused, in this country, there was also a racial dimension. During the Civil Rights movement, my Hoosier father was reproved by a white Southerner for referring to a black woman as a "lady." The exchange went like this:
"Where's your car?"
"Over there, where that lady is crossing the street."
"That's no lady," the Southerner said contemptuously, "that's a woman."
I suspect that right-wingers have adopted a new linguistic tactic--attaching scary adjectives to already loaded political terms.
Bill O'Reilly blusters about "the far left," and then alludes to Ben & Jerry. Has Bill forgotten about socialism, communism, and anarchism? These are the far, or radical, left, because they oppose capitalism. Ben & Jerry, it should go without saying, do not. They are capitalists.
And Senator Clinton is no radical. She's a centrist whose visage, as John Edwards pointed out, recently appeared on the cover of Fortune magazine--and not as a wanted poster or with crosshairs over it.
Those European countries that have proportional representation have a longer and more visible political spectrum than we do. There you can see a host of people to the left of Senator Clinton: Liberal Democrats, Socialists, Communists, and Greens. (The anarchists, of course, reject electoral politics altogether.)
There are two kinds of disabling political ignorance: a shallow knowledge of history and provincialism.
But if we watch old movies, those from the 1930s and 40s, we might at least acquire an understanding of American slang, like when and when not to use the word "girl."