The Speaker of the House would take over as President if both the vice president and President were no longer able to fulfill their duties.
In 1939 (Nazi-Germany) and Soviet Union agreed to split Poland.
The treaty that specified the conditions of this split is refered to as the Molotov–Ribbentrop Pact, after the Foreign ministers of the two countries that signed it. It was signed on 23. August 1939 and it was at the time officially claimed that it only determined that the two countries would not engage in aggression with each other. At the time the split of Poland (and the division of other countries such as Lithuania and Estonia between the two powers) was kept secret.
In a true democracy, the rights of the individual are not fully protected. Instead, if they wanted their rights to be protected, the best way is to abandon democracy and convert it into a republic. In a republic, the rights of the individual are protected by the constitution. Hope this helps.