Jan. 26 (UPI) -- Former U.S. Presidents Bill Clinton and Barack Obama have condemned the Trump administration's chaotic immigration crackdown that has resulted in the deaths of two protesters in Minneapolis, stating that the core values of the United States and the rights of Americans were under threat.

The separate statements from the former Democratic presidents were published Sunday after masked federal immigration officers fatally shot Alex Pretti in Minneapolis a day earlier, the second protester to be killed by federal immigration officers in the city in less than two weeks.

"Over the course of a lifetime, we face only a few moments where the decisions we make and the actions we take will shape our history for years to come. This is one of them," Clinton said in a statement.

"If we give our freedoms away after 250 years, we might never get them back."

Obama, with his wife, Michelle Obama, called Pretti's killing "a wake-up call" for every American "that many of our core values as a nation are increasingly under assault."