Why are there 2 senators in a state?

Answer 1

The Great Compromise was constructed by the founding fathers to designate 2 Senators to each state in order to give them equal representation. This is different than the House of Representatives designated based upon population. Senators originally were elected by the state legislatures to represent their state governments at the federal government. By each state having 2 Senators it gives them equal opportunity to represent their state government.

Indeed it is a balance to the house of representatives. In order to not give favor to the larger states in Congress, a bicameral (two room) legislature was established. One room gets 2 reps (the Senate) regardless of how big a state is. The other room (House of Representatives) gets reps depending on population. More populous states get more representation. This is believed to be a fair way of ensuring proper representation of a states interest in Congress and the lawmaking and budgetary functions it performs.

Answer 2

Every US state has the same number of senators in the US Senate: two.