Black activists and immigration groups have banded together in a coalition called #Rights4AllInDR to protest the Dominican Republic's policy to make people of Haitian descent in the Dominican Republic stateless.
However, the most unusual group to protest this Dominican policy is one that almost never gets involved in politics.

Some 560 former Peace Corps volunteers and three former Peace Corps country directors who worked in the Dominican Republic are calling for the United States to suspend funding to Dominican security forces accused of committing human rights violations against Dominicans of Haitian descent...
"Given the Dominican government's disregard for international law with respect to the status of its citizens of Haitian descent; the violent track record of Dominican security forces receiving funding and training from the United States; and the Dominican Armed Forces' readiness to execute a potentially massive campaign of rights-violating expulsions, we ask that the United States suspend its military aid to the Dominican government," the letter states.

Two years ago, the Dominican constitutional court used a retroactive reinterpretation of immigration law to strip citizenship from tens of thousands of Dominicans of Haitian descent. Anyone born in the Dominican Republic after 1929 of migrant immigrants would now be illegal, even if they had never stepped foot outside of the DR in their entire lives. "In transit" now meant pretty much anything.
200,000 people were now considered stateless.

Mileyda Benacio is 19 years old, seven months pregnant and effectively stateless — expelled from the Dominican Republic, the land of her birth, to neighboring Haiti....
“My father and mother were illegals in the Dominican Republic and didn’t follow the procedure to get me papers,” Benacio told AFP, sitting in a Haitian schoolyard.
“I have nothing, not even a change of clothes. I’m seven months pregnant, but I don’t know where to go when I go into labor, and I’ll have no clothes for my baby.”

Included in that group of 200,000 stateless Dominicans are 60,000 Dominican-born children.

Human Rights Watch has accused the Dominican police and military of "profiling", trying to discourage people from registering, and of detaining and forcibly deporting people even when they have valid documents.

Faced with growing international outrage, and a movement to boycott DR tourism, the Dominican government backed off their original plan for immediate mass deportations.
They promised not to deport any Haitian-Dominican in the application process for residency. However, that looks like can-kicking.
Of the nearly 290,000 people in the application process, less than 9,000 have been granted residency, while almost 50,000 have been rejected.

There are more than 300,000 actual illegal Haitian immigrants, and so far more than 40,000 of them have fled the Dominican Republic ahead of the coming crackdown. If their fate is any indication, we could be on the cusp of a huge humanitarian crisis.

Tens of thousands of Haitians and Haitian-Dominicans have fled the Dominican Republic in response to its strict new immigration policy with many settling in squalid camps in Haiti.
Haitian officials estimate the population at four camps in the south of Haiti is at least 2,000 and growing....
Without homes to return to, many settled in the camps here and depend on food and supplies from aid and church groups. Haitian president Michel Martelly has called their plight a humanitarian crisis.
“People here barely have food. Twice the government came and gave out hygiene kits. We need food!” Andres said.

If actual Haitian are winding up in refugee camps, what happens when tens of thousands of Dominicans who have never been to Haiti get sent there?
In a land of malaria, cholera, and dengue, I hate to imagine what those refugee camps on the border will look like when tens of thousands of people get dumped there.

As for now, the Obama Administration has been largely silent on this growing crisis.
Until now the only feedback the Obama Administration has had on the matter is a State Department report, but the report is damning.

According to the most recent State Department report on human rights in the country, released this summer, Haitians and their descendants are routinely denied “basic education, health, and documentation services.” Persons of “darker” complexion are also denied “access or services in banks, service in restaurants and stores, entry into nightclubs, enrollment in private schools, and birth registration in hospitals.”
The report also called institutional discrimination, like the 2013 high court ruling on citizenship, the country’s “most serious human rights problem.” In other words, the United States has no problem acknowledging the scope of the humanitarian crisis faced by Haitians and their descendants in Haiti. And yet beyond the State Department report, the Obama administration has been largely silent on the crisis, and largely unwilling to intervene.

To me that report is so damning that it begs the question of, "How can you not translate these words into action?"
The United States has immense leverage on the Dominican Republic. We are the DR's most important trading partner. At the very least the Obama Administration needs to make the symbolic action that hundreds of former Peace Corps volunteeers have demanded and cut off military aid to the Dominican Republic. Now!