Help with this too:/ 11th grade history bs

Why did president johnson decide not to run for reelection in 1968?

The chinese exclusion act was the first significant law restricting immigration into the united states. why do you think the us government singled out chinese immigrants in particular for exclusion?

Match each idea to the correct principle of government. federalism separation of powers checks and balances divides the powers of government into different branches arrowright divides the powers of government between central and state governments arrowright each branch of government has certain powers that prevents the abuse of power on the people arrowright