Kaine hurled the attack in a format Trump frequently uses to launch missives of his own, tweeting this: "Virginia is not for haters!"
The Virginia senator was referring to Trump’s complaint last week about the Hotel Roanoke’s air conditioning. The hotel hosted a Trump event.
Trump has said the Kahn family is attacking him.
Kaine first mentioned the crying baby incident earlier today at a rally in Daytona Beach, Florida.
When Trump encountered a crying baby during his a speech in Ashburn, Virginia, today, he initially didn’t seem to mind the baby’s disruption.
Then he changed his mind.
“Actually, I was only kidding, you can get the baby out of here,” Trump said.
Kaine fired back at a stop on his jobs tour in Florida.
“I saw that Donald Trump kicked a crying baby out of an event earlier today,” Kaine said. “Sometimes you wonder who the baby is.”