INDIANAPOLIS (AP) — Ted Cruz has told reporters in Indiana that he will make a “major announcement” this afternoon.

This, amid speculation he will name a running mate even though he trails Donald Trump.

His aides have identified a “short list” of possible vice presidential candidates. A spokeswoman for Carly Fiorina has confirmed that the former business executive is among those being considered.

Cruz cannot get the 1,237 delegates needed to clinch the GOP nomination but he’s trying to prevent Trump from crossing the delegate threshold and push the Republican race to a contested convention.