In his very first speech as Senate majority leader in January, Sen. John Thune (R-S.D.) said, "And one of my priorities as leader will be to ensure that the Senate stays the Senate. That means preserving the legislative filibuster — the Senate rule that today has perhaps the greatest impact in preserving the Founders’ vision of the Senate." This was a wise and prudent way to maintain the institutional strength of the nation's upper chamber.
This week, however, that strong in...