Tim Walz thanks Democratic convention as he accepts vice presidential nomination

Democratic vice presidential nominee Minnesota Governor Tim Walz speaks during the Democratic National Convention (J Scott Applewhite/AP)

Tim Walz accepted the nomination for vice president in a Democratic National Convention speech that blended optimism with fierce critiques of Republican rival Donald Trump.

The Minnesota Governor, little known before his selection by Vice President Kamala Harris, thanked the packed arena in Chicago.