Afghan President Hamid Karzai's main political rival is questioning the president's commitment to fighting corruption. Former foreign minister Abdullah Abdullah withdrew days ago from a second-round runoff vote because of concerns over fraud. On Tuesday, he said Mr. Karzai's government lacks legitimacy because of the controversial election process that declared Mr. Karzai the winner by default. Abdullah addressed a news conference in Kabul. It followed a similar conference by Mr. Karzai Tuesday in which the president vowed to "make every possible effort" to eradicate government corruption, but also appeared to reject removing high-level officials in any anti-corruption purge.