117th U.S. Congress

"The conversation with the Ukrainian leader just showed that [Trump] has learned nothing in his time as president, and wants to do all over again what apparently happened in the last election but with another power."

"There's something like 210 [House Democrats] that said they favor an impeachment inquiry. Whether all of those folks would say they favor actual impeachment at this point is a different question."

[On climate change and global action] Well, ultimately this is something that requires all of industry, all people everywhere in the world to take action. And that's one of the reasons why we haven't made more progress so far. So really hard problem of, of collective action building international agreements, getting countries to line up.