WASHINGTON (Reuters) - The U.S. jobless rate unexpectedly jumped to 10.2 percent last month, a 26-1/2-year high, adding to pressure on the Obama administration to do more to tackle unemployment even as signs of recovery mount. The Labor Department said on Friday that employers cut 190,000 jobs in October, more than the 175,000 markets had expected but fewer than the 219,000 jobs lost in September.