In a tribute given from the Senate floor, Alaska’s Sen. Lisa Murkowski recognized her longtime colleague Sen. John McCain for his “passion” and “legendary arguments.”

Highlighting his early work on climate change, Murkowski pointed to the climate impacts Alaska is experiencing, pointing out the late Senator “visited Alaska, and it helped validate his view that climate change is real and something that we have to deal with.”

“And I agree with John,” she added. Over the years, Murkowski has used her chairmanship of the Senate Energy and Natural Resources Committee to push an energy bill that would modernize U.S. energy policy. “He had remarkable intellect. He had an iron will, most certainly. Unquestionable integrity. Courage that was absolutely unwavering.”

Her full speech is below: