US President Donald Trump today discussed with German Chancellor Angela Merkel the conflicts in Syria and Yemen and the "urgent security challenge" posed by North Korea in a phone call. <br/>'<br/>The White House said in a readout of the phone call that the leaders discussed the conflicts in Syria and Yemen and the urgent security challenge posed by North Korea. <br/>'<br/>Trump also reaffirmed American support for German- and French-led efforts to negotiate a peaceful settlement to the conflict in Ukraine on the basis of the Minsk agreements, the White House said.<br/>'''''<br/>