Clinton calls Trump too unsteady to be president

A combination photo shows U.S. Democratic presidential candidate Hillary Clinton (L) and Republican U.S. presidential candidate Donald Trump (R) in Los Angeles, California on May 5, 2016 and in Eugene, Oregon, U.S. on May 6, 2016 respectively.

USA: Democratic presidential front-runner Hillary Clinton pivoted to a general election matchup against Republican candidate Donald Trump on Thursday, saying he is dangerously unpredictable and not qualified to be president.

Confident that she is finally close to defeating U.S. Senator Bernie Sanders of Vermont for the Democratic nomination, Clinton turned heavy fire on Trump, who has been running about even with her in national polls of voters looking ahead to the Nov. 8 presidential election.