Is "A Lesser United States" Plausible?

O hey, I made a video regarding another famous alternate history map. Check it out below:

And if you watched the video, here is some extra speculation for all of you who actually follow this blog:

• If the United States is smaller due to not expanding into the southwest (and maybe even an earlier Civil War resulting in a victorious Confederacy) British Columbia may have gone solo and not join with Canada, much like Newfoundland almost did.
• A potentially larger Mexico that never fought the United States would be better off financially and politically and would probably never be invaded by France.
• A smaller, less expansionist United States would probably be less interested in the Pacific. Changes could include an independent Hawaii, but they may also be absorbed by another power like Britain.

Do you agree? Let me know in the comments.

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Matt Mitrovich is The Alternate Historian on YouTube, a blogger for Amazing Stories, a volunteer interviewer for SFFWorld and a Sidewise Awards for Alternate History judge. When not exploring alternate timelines he enjoys life with his beautiful wife Alana and prepares for the day when travel between parallel universes becomes a reality. You can follow him on Facebook, Twitter (@alt_historian), Tumblr and DeviantArt. Learn how you can support his alternate history projects on Patreon.