According to a SurveyUSA poll released on September 4, Republican presidential front-runner Donald Trump leads Democrat Hillary Clinton head-to-head.

The poll finds that matched up directly, Donald Trump garners 45% to Hillary Clinton’s 40%.

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In other head-to-head matchups, Donald Trump beats out Senator Bernie Sanders (I-Vt.) by 44% to 40%; Vice President Joe Biden by 44% to 42%; and former Vice President Al Gore by 44% to 41%.

The SurveyUSA poll also found that 30% of respondents believe Donald Trump will eventually be the Republican nominee, leading the field.

Jeb Bush came in second, with 20% saying they expect him to win the nomination. Following the former Florida governor in order were retired neurosurgeon Ben Carson, Senator Ted Cruz (R-Texas) and Senator Marco Rubio (R-Florida).

The poll surveyed 1,000 adults across the United States between September 2 and 3, and it had a margin of error of 3.3%.