DES MOINES, Iowa (AP) — Ron Paul has given up on becoming president, but loyal supporters are promising to promote the libertarian-leaning Texas congressman’s principles at the Republican national convention this summer, a potential complication for Mitt Romney’s goal of a peaceful coronation.

Paul backers have taken over state Republican conventions Nevada and Maine, and had a strong showing this weekend in Iowa, aiming to increase their voice and clout at the nominating convention in Tampa, Fla.