> I'm concerned about the possibility of a liberal defeating Trump in 
2020.

It's not a possibility, it's a lead pipe cinch.  Trump's had four years 
of continuous bad press.

> I've been trying to figure out which one is the lesser of evil, and 
all
> choices are pretty rocky. At the same time, I'm willing to take any 
GOP
> candidate over any of the announced Democrat candidates. With that 
being the
> case, I'm wondering if I should change my party to Democrat, just so 
I can
> vote in the primary?
> 
> Is there a democrat candidate who supports border security?

No.

> Joe Biden might be as worthless as Obama, Kamala Harris & Cory Booker 
are
> obstructionists, Bernie Sanders is a crybaby hypocrite, Elizabeth 
Warren
> wants her land back, Beto maybe? What's terrible about him?

He's a massive hypocrite (like most Corruptocrats).  He wants 
everybody - except him - to live like the Amish do - no electricity, no 
phones, no Internet, no gasoline powered vehicles, no airplanes, etc. 
etc. etc.

If you have anything at all, vote Corruptocrat and in short order 
you'll be homeless and penniless.
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