A citizen of the United States is an American. United States, American and U.S. refer to the country adjectivally (American values, U.S. forces). American rarely refers to subjects not connected with the United States.
Costume Department | Actress. Anna Wintour was born in Hampstead, London, England, the daughter of an American mother, Eleanor Trego (Baker), and an English father, Charles Wintour, former Editor of the Evening Standard. She is from an upper-class family, with many prominent ancestors.
Anna Kooiman is an American reporter. She serves as a general assignment news reporter for Fox News Channel (FNC) based in New York City. Kooiman joined the network in 2011 and is host on FNC's  FOX & Friends weekend. She also hosts Fox News Extra segments.n May 2008, Kooiman moved back to Charlotte, North Carolina to work as an Anchor/Reporter/Host for Fox News Rising, a four-hour news and entertainment morning show on the then-FOX affiliate WCCB (as of 2013, WCCB became a CW-affiliated network).