Trump marks clinching GOP delegate count with Instagram video mocking his rivals
Donald Trump speaks to Fox News (screen grab)

Donald Trump celebrated reaching the numerical threshold for the Republican presidential nomination on Thursday with a short video trolling both President Barack Obama and many conservative figures.

The video, posted on his Instagram account, features Jeb Bush, Sen. Ted Cruz (R-TX), Ohio Gov. John Kasich -- each of whom failed to stop Trump from prevailing in the 17-person GOP race -- predicting that Trump would not win.

It also shows ABC News host George Stephanopoulos, who pressed Trump earlier this month regarding his tax returns.

The clip can be seen below.

Today we, together, won the Republican Nomination for President! #Trump2016 #MakeAmericaGreatAgain

A video posted by Donald J. Trump (@realdonaldtrump) on