From Poloniex, no more trade from US:
Geofencing assets for US customers
On Wednesday, May 29th, at 16:00 UTC, the markets for ARDR, BCN, DCR, GAME, GAS, LSK, NXT, OMNI, and REP will be disabled for Poloniex customers in the US. All assets remain available for trading to customers outside the US. Once geofenced, you will be able to withdraw these assets from your wallet for as long as we support the asset globally. You will not, however, be able to see your deposit address or generate a new deposit address.
We are committed to complying with regulatory requirements in every jurisdiction. Todays action is a result of regulatory uncertainty in the US market. Specifically, it is not possible to be certain whether US regulators will consider these assets to be securities. We understand how frustrating this choice is, and will continue to focus time and energy on supporting positive policy and regulatory developments for crypto assets in the US and around the world.Posted by The Poloniex Team at 2019-05-16 21:20:46