<p>BERLIN (AFP) - Leading German politicianson Tuesday called for the US ambassador to be expelled, after the staunch ally of Donald Trump was accused of meddling in domestic politics and aggravating already tense ties.</p>
<p>Richard Grenell had taken up his diplomatic posting in Berlin on May 8, and immediately irked Germany when he tweeted on the same day that German companies should stop doing business with Iran as Trump quit the nuclear deal with the Islamic Republic.</p>