Texas Governor Rick Perry can expect his most conservative rivals to try to knock him out of the saddle Tuesday in a high-stakes presidential debate in the key state of New Hampshire. The debate, hosted by Dartmouth College and broadcast live by Bloomberg Television, will be the first to focus solely on the economy as US unemployment remains at a stubbornly high 9.1 percent with 14 million Americans looking for work. "The goal of conservatives in the debate is to take Perry out first, and go after Romney later," said Allan Louden, a presidential debate expert at Wake Forest University.