The population and rebellion. (Tropico 5)

Decided to play in the sandbox. Put everywhere hard. Barely brought the satisfaction of the population to 55% to win the election. And then the rebels 5 units. The Board had a democracy. Said will not rebel. For the army is able to fight with such a number of rebels means no. Before the rebellion was checked. Many of the rebels were about 70% satisfaction.
Second question. How to restrict immigration? Is the Constitution a protected Paradise. But still rushing for the border people.