washington group republican democratic senators urge trump administration thursday use full weight influence help resolve rohingya crisis myanmar bangladesh 480,000 people flee home letter see reuters sign four republican 17 democratic members 100-seat senate also call secretary state rex tillerson u.s. agency international development administrator mark green provide humanitarian aid despite international condemnation burmese authorities incredibly continue deny atrocities say letter also note current u.s. law include global magnitsky act allow trump impose sanction people responsible gross violations human right senators urge trump administration act myanmar rohingya