Things have been exceedingly cordial in the Senate this session, but an unexpected move created some tension Wednesday afternoon.

The spark? A motion brought forward by Sen. Dan Patrick to repeal a bill by Sen. Kel Seliger that had passed the day before. Senate Bill 346 would require certain, politically active nonprofits to disclose the names of donors. Sen. Patrick cited First Amendment concerns and the Citizens United decision for his reversal, while Sen. Seliger described the bill as a simple transparency issue.

Click the logo below to see the exchange leading up to the vote, along with analysis from the Quorum Report‘s Harvey Kronberg.