Retired Army Lt. Gen. Ricardo Sanchez of San Antonio, an Iraq commander under President George W. Bush who later became an administration critic, will file papers today to seek the U.S. Senate seat held by Kay Bailey Hutchison. The second Democratic candidate to announce as Hutchison retires, Sanchez said he aims to bridge the partisan gap in Texas, one of the most Republican of red states. “Here in Texas, too many families are struggling to get ahead. Jobs are hard to find, our schools simply aren't good enough, and increasing food and gas prices are breaking household budgets. We need...