There needs to be enough space to allow for everyone to exit the union if they so wish. Right now we have two cats tails tied together (R & D) with the spoils going to the winner every 4 years. Most of the time that win is imaginary gains for the voters in the form of puffed up ego fooling them into thinking something was accomplished when nothing has changed.
The USA started with illegal aliens arriving from mostly Europe. Those "shared values" were debated in the early days. Assertion of borders is always about control. The problem is that we accept legal fictions such as imaginary country borders to have any legitimacy. Only personal property borders matter and they must be fought with arms. Nature decreed this to be the case. When was the last time you saw a deer sue a lion for eating one of its family?
RE: Tulsi Gabbard, she is just as bad as every other politician