(CNN) A White House aide called California "occupied territory" in a tweet touting President Donald Trump's visit to the state on Tuesday.

"Just landed in California. POTUS power swing through occupied territory," Joe Grogan, director of the Domestic Policy Council, tweeted Tuesday night.

Just landed in California. POTUS power swing through occupied territory. ⁦ https://t.co/3juICy6NHN — Joe Grogan (@joegrogan45) February 19, 2020

Grogan's comments come just as Trump landed on the West Coast, where he's expected to visit several western states including California -- home to a few Republican enclaves, but historically a secure Democratic heavyweight. Occupied territory typically refers to land that has been conquered by an opposing force, such as another country's military.

CNN has reached out to the White House and to California Gov. Gavin Newsom's office for comment on Grogan's tweet.

Grogan wasn't the only one from the White House tweeting as the President went to California. As he was jetting west, Trump lashed out at Los Angeles Mayor Eric Garcetti, who tweeted that the city's police department "does not coordinate with ICE or participate in immigration enforcement."

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