Does discarding the California vote numbers make Donald Trump lead the national popular vote? > "Clinton’s 2.3-million-popular-vote plurality over Trump depends on the votes in a single state: California. Clinton has more than a 4-million-vote plurality over Trump there. _In the other 49 states plus the District of Columbia, Trump actually has a 1.7-million-popular-vote plurality over Clinton_." source Is this true? Does Trump win the popular vote of the rest of the entire country were it not for the single state of California?

Yes, by a margin of 1,656,603 votes.

I'm using the first results that came up in Google. They certainly seem reliable (especially what I believe is the official site for that state), but if there are any objections, I can find others.

California's Secretary of State counted 8,543,280 votes for Clinton and 4,373,049 for Trump, a difference of 4,170,231 in favor of Clinton.

The source used by the Wikipedia page for the election, United States Presidential Election Results, gives figures for the nationwide vote close enough to that in the question: 65,149,785 votes for Clinton and 62,636,157 for Trump, a difference of 2,513,628 for Clinton.

Subtracting California's numbers from those nationwide for each candidate gives 56,606,505 votes for Clinton and 58,263,108 for Trump, a difference of 1,656,603 in favor of Trump.