<p>MARGARET Carlson, the first female columnist in the history of Time magazine and a fixture on CNN's "Capitol Gang," is about to sever her ties to the magazine, Media Ink has learned.</p>
<p>Carlson, a well-connected Beltway insider, had been a regularly appearing weekly columnist until the Sept. 11 attacks, but she's been all but invisible in the magazine's lineup since then.</p>