I cannot create a summary of the requested article because the search results provided do not contain an article titled "Opinion: I'm a dietitian. The new federal dietary guidelines will make my job harder". Available results include information about the new US federal dietary guidelines for 2025-2030 introduced by President Trump's administration, but not a specific article by a nutritionist with that name. In order to create an accurate and factual summary, I would need access to the original article.