Same reason for small 'l' here. As long as Libertarians espouse a belief in open borders, they'll never get my vote beyond local office.
Yep. My mind changed about borders years ago when it became clear to me that in fact we are being invaded (the general lack of uniforms and artillery doesn't make it any less of an invasion). Tightening up the borders is a clean and simple answer to the problem, but it's the only one I have at present, given the risk of external terrorist attack.
Small "L" checking in too. Seriously, Libertarians should run as Republicans. They'll never get anywhere. The GOP could use a dose of libertarianism anyway.