.bashrc/.profile is not loaded on new tmux session (or window) — why?

Question

When tmux starts or opens a new window, it does not load my .profile or .bashrc. I end up typing . ~/.bashrc every time. Is there a

Answer 1

From this thread:

• https://bbs.archlinux.org/viewtopic.php?id=124274

seems using .bash_profile would work.