Updated: February 26, 2016 4:02 PM ET | Originally published: February 26, 2016 1:58 PM EST

New Jersey Gov. Chris Christie endorsed businessman Donald Trump for president Friday, and political insiders took to Twitter to vent.

Tim Miller, who ran communications for Jeb Bush, insulted both Trump and Christie for their new partnership:

As did David Kochel, also formerly of Bush’s campaign:

Ohio Gov. John Kasich, one of Trump’s rivals for the nomination, seemed to reference Christie’s endorsement of Trump when he touted his own endorsement by a former New Jersey governor:

Former House Speaker Newt Gingrich tweeted about what the news meant for the GOP as a whole:

Trump’s campaign manager was understandably jubilant about the news:

The publisher of the New Hampshire Union Leader, the influential New Hampshire paper which had endorsed Chris Christie, was less thrilled:

And Fergus Cullen, the former leader of the New Hampshire GOP, was also disappointed:

Alice Stewart, the new communications director for Texas Sen. Ted Cruz, seemed shocked by Christie’s praise:

And Ines de la Cuetara from ABC tweeted out a statement from Florida Sen. Marco Rubio’s adviser Todd Harris saying the alliance with Christie shows Trump “is incapable of explaining any of his ideas”:

Write to Tessa Berenson at tessa.berenson@time.com.

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