Former foreign minister Abdullah Abdullah, who lost the last election to President Hamid Karzai, wants a comprehensive audit of last month's runoff election ballots.
Wednesday's meeting is billed as an exchange of ideas over border issues that could boost Gov. Rick Perry's stature in the GOP. It could also give Obama a talking point that House Republicans are not so eager to talk about.
Abdullah Abdullah rejected as fraudulent preliminary results released Monday that showed him trailing behind his rival in last month's election. The US is the biggest aid provider to Afghanistan.