Former Republican candidate Carly Fiorina is being vetted by the Cruz campaign, a spokeswoman for 61-year-old Texas businesswoman confirms to PEOPLE.
Cruz told reporters on Monday that his campaign has a short list of candidates for the vice presidential spot on his ticket – news his campaign manager Jeff Roe had revealed on Twitter earlier in the day.
"No decision has been made in terms of who a nominee would be or what the timing would be of the announcement," the senator insisted.
Fiorina, who previously served as the CEO of Hewlett-Packard, suspended her Presidential campaign in February. Her spokeswoman says that she's been traveling the country to campaign for Cruz ever since.
What You Need to Know About a Contested GOP Convention
Cruz and John Kasich announced on Sunday that they will work together to prevent Trump from winning the GOP nomination. Kasich promised the Texas senator a "clear path to victory" in Indiana's upcoming winner-take-all contest. In return, Cruz will concede both Oregon and New Mexico to Kasich. The candidates hope the result will be blocking Trump from obtaining the 1,237 delegates needed to clinch the GOP nomination.
The news came just ahead of Tuesday's five major primaries in Connecticut, Delaware, Maryland, Pennsylvania and Rhode Island.
Reporting by Sandra Sobieraj