Hispanic Americans support Hillary Clinton over Donald Trump by nearly a four-to-one margin, according to a Florida Atlantic University Business and Economic Polling Initiative released late Wednesday.

Clinton scored 66 percent of Latinos' votes compared to Trump's 18 percent in the July 1-31 poll. A net 15 percent of respondents were undecided.

The Democratic nominee leads the GOP nominee by 48 points, a significant jump from the 26-point margin she held in May.

"Clinton has taken some major strides to increase her support among Hispanics," Monica Escaleras, Ph.D., director of the BEPI, said. "Her efforts to win over many who said they were undecided a couple of months ago are paying off, while Trump has actually seen his support drop by more than 5 percent."

President Obama received 71 percent of support from Latinos in his 2012 re-election, a number the former secretary of state is not too far off from hitting.

The billionaire businessman may be in an uphill battle in battleground states like Florida and Colorado where Hispanic voters make up a higher percentage of the voting bloc than in other states.

The poll was conducted among 500 national Hispanics and had a 4 percent margin of error.