Barack Obama’s consistently upscale performance over the past few weeks, including the recent win in the Wisconsin primary, seems to have unsettled Hillary Clinton. The former first lady has responded by hinting that the Obama is big on words, but empty on action.

Clinton made the allegation against Obama while speaking to an audience rally at Youngstown, Ohio, the night after she was defeated by Obama in the Wisconsin primary. She told the gathering that the primary campaign is “about picking a president who relies not just on words but on work—on hard work to get America back to work.” She then went on to tell the audience that the “best words in the world are not enough” unless they are matched with action.