Poll: Clinton maintains big lead as voters doubt Trump's temperament

Hillary Clinton leads Donald Trump by 9 points — 50 percent to 41 percent — in the latest NBC News|SurveyMonkey Weekly Election Tracking Poll. The numbers were virtually unchanged since last week's poll. Generally low favorability and negative attitudes among voters plague both candidates, however, as they make appeals to voters in key swing states in the weeks ahead. RELATED: Donald Trump's 2016 campaign Donald Trump's 2016 campaign CHARLESTON, WV - MAY 05: Republican Presidential candidate Donald Trump speaks during his rally at the Charleston Civic Center on May 5, 2016 in Charleston, West Virginia. Trump became the Republican presumptive nominee following his landslide...