WATCH: Trump, Cruz, and Kasich appear on CNN Republican town hall

The three remaining Republican presidential candidates are scheduled to appear on a CNN town hall event in Milwaukee on Tuesday night.

Vox reported, however, that the GOP front-runner, Donald Trump has already threatened to boycott the event after accusing the network of being "really one-sided and unfair" toward him.

Trump's opponents, Sen. Ted Cruz (R-TX) and Ohio Gov. John Kasich are also slated to take part in the event, which will be hosted by Anderson Cooper. Cruz has been endorsed by Wisconsin Gov. Scott Walker. The town hall is being held a week before the state's Republican primary.

Update, 11:56 p.m. EST: The event can be seen in its entirety below.