So basically, it's illegal to use a federal government position to campaign. If you're a postal carrier, for example, and you want to support AOC's congressional campaign, you do it on your own time. You can't wear her campaign button on your uniform.
Conway isn't "talking bad about another political party." She's campaigning while on the federal payroll and in the guise of her job, after having been warned numerous times since 2016 to cut it out, which is why a Republican special counsel has requested prosecution.