American tennis players continued to face questions about the Trump administration and U.S. politics at the Australian Open, with rising star Learner Tien the latest to shut down that line of inquiry. Tien, who turned 20 just last month, was speaking to the media after his quarterfinal loss to No. Tien, a California native whose parents emigrated from Vietnam, briefly paused before rubbing his brow and declining to engage. Tien was the latest American asked to speak out about U.S. politics over the last week. AMANDA ANISIMOVA DEFENDS RIGHT TO AVOID 'CLICKBAIT' QUESTIONS ABOUT US POLITICS AT AUSTRALIAN OPENAnisimova recently revisited the line of questioning during one of her postmatch press conferences.