This Senators Response to 2A Question clearly shows the PROGRESSIVES Stance

Guy says" The Second Amendment shall not be infringed. You people need to understand that. Senator says Go Eff yourself but he didn't say F
What a class act.
However, it clearly shows the attitude of the self labeled Progressive Caucus.
https://www.youtube.com/watch?v=up7FyLLQ8xU&feature=youtu.be

if you want to skip ahead to 37 second mark to get the full effect.