Voters have elected their senators in the privacy of the voting booth since 1913. The framers of the Constitution, however, did not intend senators to be elected in this way and included in Article I, section 3, "The Senate of the United States shall be composed of two Senators from each state, chosen by the legislature thereof for six Years; and each Senator shall have one Vote." The election of delegates to the Constitutional Convention established the precedent for state selection. The framers believed that in electing senators, state legislatures would cement their tie with the national government, which would increase the chances for ratifying the Constitution. They also expected that senators elected by state legislatures would be able to concentrate on the business at hand without pressure from the populace.
