Blog fork

I am tempted to pursue more international politics discussing on this blog, however, I wanted this space to be more about my trip plans (if any). So I m considering few options:
1- Have one common blog with all my posts. The discussion may become dry for some readers and would just lose interest.
2- Create a new dedicated blog, potentially inviting new editors: you to blog. This blog will stay focused on the trip plans.
3- Just dont blog on politics. Who cares anyway.

Please help me take a decision on this.