A former staffer for U.S. Sen. Mary Landrieu pleaded guilty Tuesday to sexual assault of two women in 2010, according to a Washington Post report.

Donny Ray Williams, who worked for Landrieu's disaster recovery subcommittee, reportedly pleaded guilty to third-degree sexual abuse, two misdemeanor counts of sexual abuse and one count of misdemeanor threats.

Prosecutors said Williams was involved in two incidents in which he had sexual contact with two different women without their consent. One incident involved spiking a drink with Ambien. The other involved alcohol.

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