Conversation so far:
When did Sérgio Mendes's career begin?
Mendes formed the Sexteto Bossa Rio in 1961.
What was Sérgio Mendes's first recording?
Mendes recorded Dance Moderno in 1961.
Where did Sérgio Mendes do his first tour?
Mendes did his first tour in Europe and the United States.
What was Sérgio Mendes's first album named?
Sérgio Mendes's first album is titled Dance Moderno.
Who was Sérgio Mendes's record producer?
Herb Alpert took over as producer for the A&M albums.
Did Sérgio Mendes perform on television?
Mendes performed the Oscar-nominated The Look of Love on the Academy Awards telecast in April 1968.

Question: Why were they ordered to leave the US?
Self-contained rewrite: Why were the Sexteto Bossa ordered to leave the US?