Democrats are threatening a litany of structural changes if Republicans move forward with confirming someone to replace Ruth Bader Ginsburg on the Supreme Court. Maybe instead, they should be reflecting on the mistakes that put them in the position in which they find themselves today.

In 2005, Harry Reid said that ending the filibuster on presidential nominations would “violate over 200 years of Senate tradition and impair the ability of Democrats and Republicans to work together on issues of real concern to the American people.” Eight years later, Reid was the one who did exactly that, ending the filibuster. He even held a victory party with liberal activists to celebrate it.