LONDON :The dollar rose on Thursday, adding to a strong run this week, helped by a weakening euro beset by a political crisis in Paris and a struggling yen amid a change of guard in Japan's ruling party.  Markets this week have also grappled with a lengthening U.S. government shutdown. The euro has been struggling following the resignation of France's Prime Minister Sebastien Lecornu and his government earlier this week. But President Emmanuel Macron still surprised markets with plans to