One of the super PACs supporting Sen. Ted Cruz has received a $1 million donation from Republican megadonor Dick Uihlein.

The donation to the pro-Cruz Keep the Promise super PAC and commitment from Uihlein came Wednesday evening. Multiple officials confirmed the donation to POLITICO on Thursday.

Uihlein, who founded the Uline shipping company, previously supported Wisconsin Gov. Scott Walker when he was in the presidential race and donated $2.5 million to the Unintimidated super PAC supporting Walker.