Donald Trump will showcase his vice presidential pick at a public event this Friday, July 15th. Trump’s possible picks are expectedly now narrowed to four candidates: Indiana Gov. Mike Pence, former House Speaker Newt Gingrich, New Jersey Gov. Chris Christie, and General Michael Flynn.

While the joint appearance is expected on Friday, it’s not clear whether or not the identity of the pick could be leaked earlier in the week.

Trump is scheduled to attend a fundraiser and rally in Indiana Tuesday night with Pence; he campaigned with Christie on Monday and with Newt Gingrich last week. A basic breakdown of the candidates can be viewed here.

He told the New York Times earlier Tuesday that he intended to make a decision “over the next three- to four-day period of time,” ensuring his “gut” would be an important factor in making the decision.