raising e-mail telling supporters jeb has a tough road ahead. if your strength and support, he will succeed. this comes as jeb is facing his biggest hurdle, yet, donald trump, who is drawing huge crowds. >> it's the summer of trump. they are calling it the summer of trump. >> reporter: the donald trump tour is making its way from the northeast -- >> thank you. thank you. >> reporter: -- to the south today. hosting friday night pep rally in mobile, alabama, boasting the largest crowd, yet. >> 30,000 to 40,000 people in alabama. >> reporter: he's been known to exaggerate his numbers. >> outside, sadly, we have thousands of people that can't get in. >> we have a lot of people outside, hundreds and hundreds of people standing outside. >> reporter: perhaps this time, the proof is in the tickets. tonight's event has been relocated, twice. it was first set to take place here in the civic center