Jackson Cosko (R) with accomplice Samantha Deforest Davis (L)

Ex-Democrat staffer Jackson Cosko was sentenced to prison last month in what federal prosecutors say was the largest data theft in Senate history.

In October 2018, during the senate hearings for Judge Brett Kavanaugh, Capitol Police arrested 27-year-old Jackson Cosko of DC for “allegedly posting private, identifying information (doxxing) about one or more United States Senators.”

Jackson Cosko also threatened to leak Republican Senators’ children’s health information if any witnesses dared go to the authorities about his criminal activities.

But he didn’t act alone — Cosko had an accomplice — 21-year-old Samantha Deforest Davis was charged last month in federal court just hours after Jackson Cosko was sentenced.

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Samantha Deforest Davis on Tuesday pleaded guilty to two misdemeanor charges — aiding computer fraud and evidence tampering, reported Politico and she could face up to 18 months in prison.

Federal prosecutors however indicated they may not seek prison time, but rather have Davis serve in a halfway house or home confinement.

Davis told prosecutors she didn’t know Jackson Cosko was going to doxx Republican lawmakers but she admitted knowing he was going to tamper with computers.

Cosko pleaded guilty in April to crimes related to an unparalleled effort to ransack a Senate office, extorting a Democratic senator, illegally harming Republicans for their political views and blackmailing a witness.

Cosko also left spy devices on the US Senate network that went undetected by police.

Prosecutors wanted to make an example out of Cosko to deter future criminal conduct from unhinged leftists.

“The government believes that a significant sentence would help to make clear that difference of political opinion do not entitle people to engage in politically motivated, criminal attacks threatening elected officials with whom he disagrees, and would thereby encourage respect for the law, and deter future criminal conduct,” prosecutors wrote

Jackson Cosko was sentenced to 4 years in prison last month.