Hampel entered the newly founded AfD in 2013 and was chairman of the Landesverband (federal state association) of the party in Lower Saxony from 2013 to 2017.[3]
In 2017 a criminal investigation alleging fraud and tax evasion was conducted against Hampel; the lawsuit was abandoned without further action.[4]
At the German federal election in September 2017, AfD — which was previously unrepresented in the Bundestag — became the third party in the Bundestag with 12.6% of the vote. The AfD got 94 of the 709 Bundestag seats; Hampel has one of them.