Vice President Joe Biden reassured NATO allies that the United States is committed to them amid concerns of a Donald Trump presidency.

"This is an historic day, I can remember being a young senator and watching my colleagues react as I did and seeing people lining up holding hands — the Baltic Way," Biden said during remarks in Riga, Latvia, according to a pool report. "It was an electrifying moment and there's been so much progress made since that time."

Biden, who was flanked by the presidents of Latvia, Estonia and Lithuania on Tuesday, is currently in Latvia celebrating the 27th anniversary of the Baltic Way, a peaceful political demonstration by the aforementioned countries showing their desire to be liberated from the Soviet Union.

Unprompted, Biden made sure to reiterate allies that the U.S. remains committed to honoring the NATO Treaty and Article 5.

"I'm here looking forward to discussing the details of decisions taken in Warsaw, also economic issues," Biden said. "But I want to make it clear, absolutely clear to all the people of the Baltic States, we have pledged our sacred honor, the United States of America, our sacred honor to the NATO Treaty and Article 5."

Article 5 declares that an armed attack against one NATO member is an armed attack against all NATO members.

Biden declared that the U.S. has "never reneged on any commitment we have made" and that "our sacred honor is at stake."

He then added that Trump's remarks are "nothing that should be taken seriously, because I don't think he understands what Article 5 is."

Last month, Trump said that as president he would only come to the defense of the Baltic States against a Russia attack of those nations have "fulfilled their obligations to us."

"And, but there is continued overwhelming bipartisan agreement in the United States of America, in both political parties to maintain our commitment to NATO, we reaffirmed that in Warsaw, and the concern that the US is somehow disengaged ... is simply not true," Biden said, referring to last month's NATO summit in Warsaw. "As a matter of fact our presence will be enhanced, there will be more NATO partners on the Russian border, there will be more than a single tripwire. We are absolutely thoroughly 100 percent committed to our NATO obligation including and especially to Article 5."