Spys get captured and traded from country to country all the time. We capture them and hold them until they capture one of ours. We negotiate a swap and the game continues. Whats important here is that Pollard has been in prison here for a couple decades I think. And if we're giving him to Israel them were getting something valuable in return. Speculating here but I think Israel is going to play a major role in providing intelligence that gets Trump re-elected.