Cuellar was being challenged by progressive Jessica Cisneros, who forced a runoff election in May.
requested by challenger Jessica Cisneros determined Cuellar prevailed by 289 votes.
Cuellar's victory came amid several controversies, including an FBI investigation that led to raids of Cuellar's Laredo, Texas, home and campaign office. Cuellar's attorney has said the congressman is "While we may differ on certain positions, we share a common ground on many issues to improve our communities and strengthen families. It is now time to come together and win the General Election in November," he said.
Progressive groups backing Cisneros such as Justice Democrats also criticized the outside spending, as well as the House Democratic leadership's support for Cuellar, who received endorsements from House Speaker Nancy Pelosi and Rep. Jim Clyburn, both of whom appeared at a campaign event with Cuellar in the closing weeks of the contest.