Based on the clue 'buchanan didnt like this senator from illinois tho...', what is the answer?

Which performer is associated with 'bucephalus'? Based on the clue 'buchanan 65 at his inauguration had the youngest v...', what is the answer? Based on the clue 'buchanan became a jacksonian democrat after this p...', what is the answer? What is associated with: buchanan became the first president to have a state secede under him when this one did in 1860? Based on the clue 'buchanan was born in the town of stony batter in t...', what is the answer? Based on the clue 'buchanan was on both sides of the fence for this p...', what is the answer? What is associated with: buchanans dreams of the presidency were postponed when this new hampshire man was nominated in… What is referred to by 'bucharest bonn bern'?