Why Joe Biden Saw Mixed Success With Latinos

Democrats' long-term hopes for electoral success have long cited the growing Latino population in the country. But former Vice President Joe Biden's performance in heavily Latino areas of key states has concerned members of his party — and may have cost him Electoral College votes, according to groups and activists working to mobilize Latino voters.

Nationally, Biden appears to have gotten support from roughly twice as many Latino voters as President Trump, but that support looked very different depending on where you looked in three key states with large Latino...