Eight Republican candidates will square off Tuesday night for the fourth GOP presidential primary debate. 

The debate, hosted by Fox Business Network and The Wall Street Journal, will be held in Milwaukee, Wis. 

The prime-time event begins at 9 p.m. ET. An earlier debate featuring four lower-polling candidates will begin at 7 p.m. ET. 

Follow both debates here

The eight candidates set for the prime-time debate are: 

Billionaire businessman Donald Trump; retired neurosurgeon Ben Carson; Florida Sen. Marco Rubio; Texas Sen. Ted Cruz; former Florida Gov. Jeb Bush; former HP CEO Carly Fiorina; Ohio Gov. John Kasich; and Kentucky Sen. Rand Paul. 

The candidates set for the earlier debate are: 

New Jersey Gov. Chris Christie; former Arkansas Gov. Mike Huckabee; Louisiana Gov. Bobby Jindal; and former Pennsylvania Sen. Rick Santorum.