It's now official. 

Donald Trump has surpassed the 1,237 delegates needed to clinch the GOP nomination. 

According to the latest AP tally following Washington state's primary Tuesday, Trump is at 1,238 delegates, a development that nearly all political pundits thought to be impossible about a year ago. 

Byron York and Howard Kurtz reacted this morning on America's Newsroom, with York pointing out that Trump was serious about this campaign much earlier than people believed. 

York said Trump started making contacts around Christmas in 2014 and spent a lot of time in Iowa in the subsequent months before announcing his run. 

Martha MacCallum reminded us that Trump registered the "Make America Great Again" trademark just days after the 2012 election. 

Kurtz said the news, which was expected, adds an "exclamation point" to Trump's amazing run. 

But he said Trump still faces questions about whether he can unify the Republican Party. 

Watch the segment above and don't miss Greta's special look inside the home of the Trump family, tonight at 7:00 ET on On the Record: Meet the Trumps.

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