Secretary of State Rex Tillerson to skip NATO summit, travel to Russia in April

Tillerson's decision was met with sharp criticism by Democrats.

"After these consultations and meetings, in April [Tillerson] will travel to a meeting of the G7 in Italy and then on to meetings in Russia," the statement adds.

The announcement comes on the heels of fresh criticism of NATO from the Trump administration with the president making the dubious claim that Germany "owes vast sums of money to NATO."

NATO's mutual defense clause -- the cornerstone of the 60-year-old alliance -- calls for a response by all members of the pact in the event of an attack on one member country.

Trump said during the campaign that he would decide whether to come to their aid only after reviewing whether those nations "have fulfilled their obligations to us."

Democrats were quick to jump on Monday's news.

"I cannot fathom why the Administration would pursue this course except to signal a change in American foreign policy that draws our country away from western democracy's most important institutions and aligns the United States more closely with the autocratic regime in the Kremlin."

ABC News' Chad Murray contributed to this report.