Chuka Umunna MP speaking at podium after joining Lib Dems

The speaker discusses their commitment to remaining in the EU and criticizes the Labour Party for its stance on Brexit and internal issues like anti-Semitism and bullying. They encourage those with progressive values, particularly from the Social Democratic center-left, to join the Liberal Democrats. The speaker concludes by emphasizing the importance of unity and progressive values for the national interest.

According to the speaker, what is the role of the Liberal Democrats in the political landscape?

What does the speaker urge the audience to do in the national interest?