A panel of federal judges on Friday peppered lawyers for Texas with skeptical questions about the state’s new voter identification requirement and whether it runs afoul of federal anti-discrimination laws. At the end of a week-long trial in Washington, D.C.’s District Court, the three judges questioned whether requiring voters to present government issued photo identification – such as a driver’s license or passport – was too onerous, and may disproportionately affect black and Hispanic voters. “People who want to vote already have an ID or can easily get one,’’ said John Hughes, one of the lawyers representing Texas. Among election lawyers, the case is seen as an early legal test for a number of voter ID laws recently passed or under consideration by Republican-controlled state legislatures. Texas passed its law in 2011, saying it would help prevent voter fraud. In March the Justice Department moved to block it, saying it discriminated against minorities by making it more difficult for them to vote. The Obama administration has also moved to block a voter ID law in South Carolina, a case that will be heard next month.