Ok, the Congressman is a fool.
If the US Government decided to go balls to the wall and destroy bitcoin, then sorry bitcoin will die.
1. They could confiscate all bitcoins in the US and crash the markets.
Nope. Make all Americans suddenly sell their bitcoins, and it would not "crash the markets", only produce a temporary downtrend, soon to be absorbed by the rest of the world.
2. They could have elite computer hackers target all nodes.
Nope. There are even nodes in Tor. Short of a bug in Bitcoin itself, there is nothing they can do. This isn't Ethereum...
3. They could send in special forces covertly and destroy all ASICS warehouses, with explosives.
That maybe, but it wouldn't stop mining. Besides, will your little country risk war with the likes of China and Russia? This isn't Afghanistan and a bunch of guerrilla fighters...
4. They could just compromise the 4 mining pool operators and make them double spend and freeze all new transactions.
Actually go ahead and try it. The real blockchain would go along, the moment you foolishly freeze yours (Are you even thinking?)
5. They could just threaten to bomb anyone that mines bitcoin.
Good luck eradicating computing power from the world.
Realize that if the decision to use force is ever on the table, then bitcoin is dead.
It would actually be really funny to see them try, please convince them, it would be really embarrassing. Have your so called cyberwarfare unit do it.
Bitcoin Energy Waste ensures that mining operation can not hide from government eyes.
Only if large scale mining prevails, which you yourself has already decided to wipe out. The Bitcoin network doesn't care.
Only Proof of Stake networks have the ability to hide from a world government intend on destroying it.
PoS is garbage.