Mitt Romney's third son, Josh, spoke to delegates and guests from North Carolina Wednesday morning about why he thinks his father will make a great president.

"At the end of the day, this is not an ego thing for my dad. He didn't need another notch in his belt," Josh Romney said. "He's doing this for all the right reasons ... to help people who are suffering under this economy."

The Republican presidential nominee's five sons have been active in his campaign, traveling around the country to talk to voters about issues affecting them and about how Mitt Romney is the candidate to solve them.

For Josh Romney, who has five children of his own, being on the road is fun, but it can be hard on his wife and family. His own job is easy – he gets to talk about a candidate for whom he's got obvious passion.

"My dad is my hero," he said.

Mitt Romney's business experience will help him rein in out-of-control spending in Washington, D.C., and reduce the nation's mounting debt, his son said.

"My parents have 18 grandchildren, who they love dearly, and they think about their future in this country. If you imagine another four years with Obama, that's a terrifying thought," Josh Romney said. "What legacy are we leaving the next generation? Are we leaving them $20 trillion in debt?"

Earlier this month, second son Matt Romney visited a Morrisville barbecue restaurant to campaign for his dad.