5 people nominated by the Norwegian parliament, they typically do a stint for a number of years so I assume some of them will be same as last time?
Don't think there's any evidence that direct bribery plays a part but political pressure must do, given some of the more dubious winners.
Fine line to walk I suppose, acquiesce too far and you destroy the credibility of the award. Think that ship has already sailed for many people, but if they choose Trump it'll probably destroy whatever credibility is left.