It's too bad there isn't a patent or trademark law for political ideas. It wouldn't improve performance, but at least it would remove a certain type of grotesque insanity.
Immediate example: In Massachusetts, Romney developed a plan for Infinite Insurance Company Monopoly. Obama re-used the plan at the national level and re-branded
it. The re-branding creates all sorts of mischief and convoluted twisting. Romney is now vowing to repeal his own idea, and we're supposed to trust a man who hates his own work.
Most of the previous examples involved that other evil super-rich Massachusetts Commie, Teddy Kennedy. Comrade Kennedy was the author of nearly all evil political ideas in the last 30 years. His last major idea, "No Child Left Behind", got re-branded as a Bush idea. Result: Teachers unions claimed to hate it and worked powerfully to destroy it. (Probably a good result in a twisted way, but we'd be better off overall without the twist.)
A trademark law shouldn't prevent one politician from using another politician's idea. It's theoretically conceivable that some ideas might be worth using, though I've only seen one (1996 welfare reform) in my entire lifetime. The law would simply require an idea to be branded with its author's name every single time it's mentioned.
Attributing "Kennedy's No Child Left Behind"™ to Bush would be forbidden. Attributing "Romney's Infinite Monopoly For Insurance Companies"™ to Obama would be forbidden.