President Trump’s decision Thursday to appoint former U.N. Ambassador John Bolton as national security adviser brings a hawkish presence, combined with a bulldog spirit, to the White House.

Trump announced late Thursday that Bolton would replace H.R. McMaster in the post, and while the Bush-era hawk’s staunch defense of the war in Iraq may conflict with Trump’s more skeptical approach, his stand on other issues — along with his penchant for getting in the face of his opponents — makes him a natural fit for the Trump White House.

“I think what you said is offensive and inappropriate — you are a munchkin in the media,” Bolton said to a Sky News host in January who asked if Trump was a “slippery fish.”

While he served at the U.N., he was no fan of the place, saying in 1994 that if the headquarters in New York City lost 10 stories, “it wouldn’t make a bit of difference.”