He was eliminated from the competition after the second ballot, CNN's UN source said.
"This was a very competitive election with three highly qualified candidates," a State Department official told CNN.
"We congratulate the winner and look forward to working with him, IOM is an important partner for the United States around the world, and we are committed to working with IOM to address the root causes of migration and secure and legal migration, "said the official.
Isaacs, who works in relief operations for the Christian Samaritan Social Purse, was named Director-General of the 169-member group in February whose mission is to "promote humane and orderly migration" through support from governments and migrants
But the agency has ruled on Friday that it will elect a non-American leader for the first time in decades ̵
In some of the excavated tweets, Isaacs shared a post describing climate change as Called "hoax," a story from the conspiracy-peddling site InfoWars shared about the "Clinton Body Count" and wrote "#Islam is not peaceful."
According to the Washington Post report in February, Isaacs apologized in a statement he deeply "regretted" his comments, adding, "I commit to abide by the highest standards of humanity, human dignity, and equality if I am to lead IOM."
But as President Donald Trump, Isaacs said, he supports more restrictive measures against refugees and migrants, once wrote on Twitter that Austria and Switzerland should consider Building a wall in the Alps to keep refugees out
"# immigration #wall #Austria #Switzerland #building rampage in #Alps to control their refugees' borders," said the tweet.
The Supreme Court confirmed this week's ban on the President's ban on the entry of people e limits seven countries to varying degrees. The measure – the third iteration of the ban – does not explicitly limit the reception of refugees, as does the first two.
These restrictions and increased January security checks for refugees from 11 countries deemed risky by the administration would have slowed down the arrival of refugees this year and contributed to the historic slump, refugee lawyers said.
The United States is currently well on its way to receiving the fewest refugees since the Refugee Law of 1980
Since the beginning of the year, the United States has received nearly 15,600 refugees, up from 46,400 in the same period The Obama Administration's Last Year, the Publicly Accessible Government
In September, the Trump administration announced that it would limit the number of refugee approvals for the coming year to 45,000, with regional ceilings of 19,000 for Africa, 17, 500 for the Middle East and South Asia (including most of the Middle East), 5,000 for East Asia, 2,000 for Europe and Central Asia and 1,500 for Latin America and the Caribbean.
CNN Michelle Kosinski, Andrew Kaczynski, Michelle Krupa and Bethlehem Feleke have contributed to this report.