As speculation over Sarah Palin's presidential aspirations heat up now that she has stepped down as Alaska's governor, a former member of George W. Bush's staff said Palin had no chance of winning the White House. "Impossible," is how Bush's former speechwriter David Frum described the likelihood Palin would become president. Frum based his opinion on Palin's decline in approval ratings from when she was announced as John McCain's Republican presidential running mate in August termed her "divisive" within the party. Asked what she represents for the future of the GOP: "political defeat."