On Thursday, former Vice President Al Gore told former TIME editor-in-chief Nancy Gibbs that he thinks that, while unlikely, there’s a possibility that the Senate could vote to convict and remove President Donald Trump from office if he’s impeached in the House of Representatives. Speaking at the TIME 100 Health Summit on Thursday, Gore said, “Listening to what President Trump has said out of his own mouth when he publicly asks foreign governments to dig up dirt on one of his principal political opponents, that is an impeachable offense.” “It’s probably still unlikely the Republican Senate would convict, but I don’t think it’s any longer possible to say that’s a certainty by any means,” he added.