Next week, the Senate will vote on the DISCLOSE Act, which would bring much needed transparency to the corporate and special interest money that allows the wealthiest few to take over our airways and coöpt our elections. Since the Supreme Court’s 2010 Citizens United decision, corporations have been able to spend freely from their treasuries to overpower the voice of the American people.

While a constitutional amendment to overturn Citizens United or a change to the composition of the Supreme Court are the only ways to completely reverse that decision, the DISCLOSE Act is a strong step in the right direction.

It’s not a new idea. First introduced in 2010 in response to Citizens United, the bill would require groups airing election ads to disclose the source of the money. Because ads can be misleading, it is essential to for voters to know who is behind them in order to properly evaluate the constant inundation of political messages. It is a simple step to increase transparency in our elections.

Of course, the GOP blocked it.

Republicans in Congress weren’t always opposed to disclosure. Senate Minority Leader Mitch McConnell once said, way back in 2000, “Why would a little disclosure be better than a lot of disclosure?” Yet after Citizens United, he’s dramatically changed his tune, calling disclousre “a cynical effort to muzzle critics of this administration and its allies in Congress.”

The Republicans’ change in tune isn’t surprising, considering that outside spending overwhelmingly favors the GOP.