Former Gov. George Pataki has canceled events in New Hampshire after his son-in-law David Levy suffered what his presidential campaign is calling a life-threatening stroke.

Levy is being transported to intensive care at Chicago’s Rush University Medical Center after suffering the stroke during a flight bound for Seattle with his wife Allison Pataki.

The two were on a long-scheduled vacation before the birth of their first child, Pataki’s campaign said.

“The Pataki’s and the Levy’s want to thank the doctors, nurses and all the staff at the Sanford Medical Center which has been world class and the people of Fargo who have opened their hearts during this difficult time,” the campaign said in a statement. “This episode is a shock to us all, as David, only 30 years of age, is a strong young man who enjoyed excellent health. We are praying for his recovery and welcome everyone’s prayers and good wishes.”

Pataki launched his presidential bid last month in Exeter, New Hampshire, but this week announced a family emergency led him to cancel events on the trail.