The comment you are responding to has been deleted. Based solely on what you said, Maya Angelou was definitively never a "United States Poet Laureate" but the argument can be made that she was a "poet laureate". A United States Poet Laureate is an official, appointed, and titled position that is typically held for a length of time [1]. However, at Clinton's request she did compose and recite an inauguration poem, so in the general sense that she was officially appointed by a government official to compose a poem for a special event [2] the argument could be made that she was a "poet laureate".

[1] https://en.wikipedia.org/wiki/United_States_Poet_Laureate [2] https://en.wikipedia.org/wiki/Poet_Laureate