Most remaining Northern Whigs, like Lincoln, joined the new Republican Party and strongly attacked the Act, appealing to widespread northern outrage over the repeal of the Missouri Compromise.

• 剩下的辉格党人，大部份如林肯一般加入了新成立的共和党，并强力抨击该法案，诉诸北方因该法案实质撤销密苏里协议而导致的群情激愤。