A legal challenge to a Texas law requiring photo ID to vote is taking place in federal court in Corpus Christi. Those opposing the law say it's a move to disenfranchise almost a million voters who aren't easily able to obtain such an identification.

Tuesday morning the court heard from an elderly disabled father and his son on how difficult it's been for the older man to get a legal photo identification since his wife died and his Texas Driver's License expired in 2006. The man described how a state provided birth certificate had too many errors for any local or state agency including the Texas department of Public Safety to help him obtain a current photo identification, which would allow him to vote in the last election.

3News caught up with one of the attorney's suing the state pushing one of his clients in a wheelchair outside the federal courthouse. Chad Dunn says they hope to prove how the law is unfair.

""What we hope is that the judge is going to hear the evidence that there are 800,000 people who are registered to vote today who don't have the right kind of id and now can't vote. And when she hears that from Mr. Carrier and others like him, she'll enjoin this law and tell the state to go back to the drawing board with it," said Dunn.

Attorney's spent the afternoon cross examining the defense experts who determined that minorities would be significantly impacted by the 2011 Voter I.D. law and attempted to poke holes in the methodologies used.

A ruling is not expected until after the upcoming November elections, so it's unclear how long this trial might last.