"Particularly within the Republican Party" is a nice way of saying that Trump alone probably manages to put out  more lies per day than the entire Democratic party combined.

[Trump made 30,573 false or misleading claims as president. Nearly half came in his final year.](https://www.washingtonpost.com/politics/how-fact-checker-tracked-trump-claims/2021/01/23/ad04b69a-5c1d-11eb-a976-bad6431e03e2_story.html)