Simpler language “correlates” with higher polls numbers for Republicans this presidential primary season, according to a new study. The opposite is true for Democrats.

An examination of top candidates’ debate transcripts — part of a study published Tuesday by Grammarly titled “The Language of Politics” — finds that Donald Trump’s minimal use of “complex language” parallels his unmatched poll numbers among his now-defeated GOP rivals. Meanwhile, Democratic front-runner Hillary Clinton’s top-of-the-class use of complex language matches her strength in the polls over Bernie Sanders.