Irish Prime Minister Micheál Martin explains why he believes President Donald Trump's investment agenda is working — and how Ireland plans to stay competitive. NEW YORK – As President Donald Trump pushes U.S. multinationals to expand investment at home, Irish Prime Minister Micheál Martin is pitching Ireland as a leading European hub for American investment while already eyeing another iconic Irish export after Trump's commitment to lift tariffs on Irish whiskey. Martin, who has met Trump several times this year, described the president as a "tough" negotiator, recalling Trump had "some choice language" for the Irish leader during their latest…