As President Donald Trump and former Vice President Joe Biden prepare to square off in their first debate next week, a new poll from the UC Berkeley Institute of Governmental Studies shows Biden leading Trump in California by 39 points, 67% to 28% with just 5% of voters saying they're undecided.
That's even more than the 62% to 32% margin Hillary Clinton beat Trump in California by four years ago.
Biden's lead hasn't changed much since July, before the presidential conventions and Biden's selection of Sen. Kamala Harris to be his running mate. He currently leads the president in every region of the state, including the more conservative Central Valley where he's ahead with likely voters by 55% to 40% and in the Inland Empire he's winning by 59% to 37%.
While Democrats and Republicans overwhelmingly support their party's nominee, nonpartisan or independent voters also prefer Biden over Trump by a wide margin, 76% to 18%.
Biden is preferred by all racial groups, including white, non-Hispanic voters who support him over Trump by two to one. Latino voters, with whom Biden has struggled in some parts of the nation, choose Biden over the president by 73% to 21% with 6% saying they're undecided.
No matter who they're supporting, likely voters say Trump is the main motivation for their preference: 63% of Trump supporters say they're voting for the president because they like him, while just 15% of Biden's supporters give that as their main reason. Just over half of the former vice president's backers say their primary reason for preferring Biden is that they don't like Trump.
Likely voters who support the Democratic nominee say the most important issue to them is that Biden will "bring the country together," while large segments of his supporters also cite the economy, the coronavirus, climate change and Supreme Court nominations (the survey was taken before Justice Ruth Bader Ginsburg died) as reasons for choosing Biden.
The top issue for Trump voters by far was the economy, with 67% saying it was important to them followed by 28% who named "policing and criminal justice."