German opposition leader Friedrich Merz believes that Europe needs to be better prepared for a possible second Donald Trump presidency, although the race for the US presidency is more open now, he said in an interview published on Sunday. The situation has changed since President Joe Biden withdrew and Vice President Kamala Harris became the presumptive Democratic nominee, Merz told the Welt am Sonntag newspaper. “Kamala Harris has triggered a very strong mobilization on the Democratic side within a very short space of time. This election campaign will now be really exciting,” the centre-right…