The Obama administration’s choice to lead the Transportation Security Administration withdrew his name Wednesday.

In a statement, Erroll Southers said he was pulling out because his nomination had become a lightning rod for those with a political agenda. President Barack Obama tapped Southers, a former FBI agent, to lead the TSA in September but his confirmation has been blocked by Republican Sen. Jim DeMint, who says he was worried Southers would allow TSA employees to engage in collective bargaining with the government.

Questions have also been raised about a reprimand that Southers received for running background checks on his then-estranged wife’s boyfriend two decades ago. Southers wrote a letter to lawmakers earlier this month acknowledging that he had given inconsistent answers to Congress on that issue.