Kerry also in a news availability there called for Nixon's impeachment as later did the House Judiciary committee by a 28-10 vote before Nixon resigned.
Well, curiously, the resolution for Nixon's impeachment was introduced by Congressman Fr. Robert Drinan, whose campaign Kerry had chaired in 1970:
Watergate-Era Members Recall Impeachment Lessons Learned
Father Robert F. Drinan, who was then a Democratic congressman from Massachusetts, says he considered obstruction of justice in the context of "abuse of power" as president. Drinan introduced the first impeachment resolution against Nixon in July, 1973, for the clandestine bombing of Cambodia, and he quickly decided that the president obstructed justice in the Watergate case.