Groups for and against House Speaker Nancy Pelosi’s drug pricing bill (H.R. 3) are airing competing ads in the new year: Groups backing Pelosi’s bill thanked lawmakers who voted for the bill in December, and those opposed praise lawmakers who voted for a House GOP alternative. However, the intent of the ad campaigns seem to differ. H.R. 3 backers are giving cover to vulnerable Democrats and Republicans who voted for the bill, while opponents praise Republicans, including some in leadership,...