Senators are preparing to revive a bipartisan group to further demonstrate the chamber’s commitment to NATO.

The organization being revived is the Senate NATO Observer Group. It was first established in 1997, to help the Senate monitor the work on the expansion of the organization to Poland, Hungary and the Czech Republic. The Senate ultimately consented to amending the North Atlantic Treaty in 1998 on an overwhelming vote of 80-19 to provide for adding those three countries.

Democratic Sen. Jeanne Shaheen of New Hampshire and Republican Sen. Thom Tillis of North Carolina advocated for the observer group to be re-established for the first time since 2007, given the potential for further expansion to former Soviet states and the ongoing concern over Russian aggression.

Russia’s 2014 annexation of Ukraine’s Crimean Peninsula — a move not recognized as legitimate by Ukraine and its Western allies — is among the flash points. Ukraine applied for NATO membership in 2008, but backed off after Viktor Yanukovych, a pro-Russian political figure, was elected president in 2010.

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