The Texas Democratic Party filed a lawsuit Thursday to block a state law that will end straight-ticket voting beginning with the general election in November. The federal lawsuit, filed in Laredo, argues that the law “will be a disaster for Texas elections,” worsening waiting times at polling sites and disproportionately affecting Latino and African American voters, who tend to live in urban areas with long ballots that require more time to fill out. “As a result, already lengthy polling-place lines will grow,” the suit says... ...More Democrats than Republicans tend to vote by straight ticket in the state’s larger counties......