dublin ireland foreign minister raise dublin concern impact trade dispute unite state canada bombardier could northern ireland peace process meet commerce secretary wilbur ross week u.s. government last week slap preliminary 220 percent tariff planemaker cseries jet partly make northern ireland potentially risk 4,200 job british province bombardier northern ireland large manufacture employer political leaders warn washington security economy britain poor region play crucial role efforts maintain peace three decades bloodshed catholic irish nationalists want province unite ireland protestant unionists want remain part unite kingdom leave 3,600 dead peace reach 20 years ago washington play key role help strike 1998 good friday peace agreement irish foreign minister intervention add pressure belfast london prime minister theresa may minority government rely support northern ireland large unionist party govern outline ross irish government concern potentially serious implications negative rule bombardier workforce belfast wide economic stability northern ireland essential support peace process simon coveney say statement ahead two-day trip washington bombardier dispute risk northern irish peace ireland tell u.s