re: BLM now taking land from TX rancher....but he owns his land - UPDATED

So, according to the Constitution (for whatever that's worth these days) the state legislatures must approve the federal acquisition of the property (not even considering that it's private property to begin with). But since the semantics of the land surrounding a river - due to the river changing course over time - the feds see an opportunity to land grab without having to deal with the states. shite, every river or stream in the U.S. is open game then.

The more I read about the BLM the more it seems that entire agency's existence is blatantly unconstitutional.