Hotline points out that the GOP Nevada caucus might move into the window.

At the same time, both parties in Washington are turning their primaries into beauty contests and selecting delegates in caucuses.

Expect more states to follow this pattern. If Feb 5th does not determine the nominations, then caucuses could determine the nominee. On the other hand, if the nominee is determined, these caucuses could turn into a fight over rules, platform, or something else. This is especially likely if the base does not trust the nominee.