Two-thirds of white voters surveyed said they were “almost certain” to vote — the highest rating on a 5-point scale — as did 61 percent of African-Americans. But only 55 percent of the Latinos polled said the same about their plans for next month’s midterm elections, according to POLITICO’s analysis.

The findings — echoed by other public and private polling from groups like Latino Decisions, a Latino-focused polling and research firm whose latest survey showed that more than half of Latino voters have yet to be contacted by a campaign or party group ahead of the midterms — could have an outsized effect in a crescent of battleground House districts running from Texas to the West Coast, where the Hispanic vote is especially important.

Democratic operatives are concerned that Latino engagement is “better than it was in 2014, but not as strong as 2016, and we need closer to 2016 enthusiasm level to flip many of these seats in Texas, California, Florida and Nevada,” said Josh Ulibarri, a Democratic pollster who works on races throughout the country.