BOSTON — Without uttering the president’s name, Representative Joseph P. Kennedy III chastised the Trump administration Tuesday night for what he said was its abandonment of the fundamental values for which the nation stands.

“Their record is a rebuke of our highest American ideal: the belief that we are all worthy, we are all equal and we all count,” Mr. Kennedy said as he delivered the official Democratic Party response to Mr. Trump’s State of the Union address.

Stating that “hatred and supremacy” are “proudly marching in our streets,” Russia is “knee-deep in our democracy,” and the Justice Department is “rolling back civil rights by the day,” Mr. Kennedy said that the administration “isn’t just targeting the laws that protect us — they are targeting the very idea that we are all worthy of protection.”

And, switching to Spanish, he spoke directly to the millions of young, undocumented immigrants brought to the United States as children, known as Dreamers. “You are a part of our story,” he said. “We will fight for you. We will not walk away.”