Trump said the address was "really boring, slow, lethargic—very hard to watch!"
The 12-year-old boy was killed in November 2014 in a Cleveland park.
The focus on the economy gave veteran politicians a chance to tout their records and experience.
Trump reveals he packs heat when asked whether he would feel more comfortable if his employees carried weapons to work.
Wednesday night's event was meant to focus primarily on business and the economy.
Economy! Jobs! Taxes!
Ohio Governor Kasich on Tuesday took a more moderate stance on a major immigration question that is dividing Repulicans.
Most GOP candidates promise brave new interventions and wars.
During a preliminary GOP debate on Thursday, none of the candidates delved into international trade, a main talking point for front-runner Donald Trump.
Participants included former Texas Governor Rick Perry and former Pennsylvania Senator Rick Santorum.
With 10 candidates, you'll need something to keep them straight.
Kasich touts gubernatorial, congressional experience.
Gov. John Kasich's position in a swing state could be a huge asset in a presidential run.