Lib Dems

The provided news articles focus on the Green Party's membership growth and Keir Starmer's (Labour Party) stance on potential trade tariffs with the US. Neither article mentions the Liberal Democrats (Lib Dems). Therefore, it's impossible to provide a summary about the Lib Dems based solely on these articles. To accurately describe their current newsworthiness, recent events, and relevance, articles specifically about the Lib Dems would be needed.