Normally liberals aren’t quite so mask-off ... please, tell me how you square this circle.
Sorry, not American, so I found your question confusing.
From the article above:
The measure, spearheaded by Sens. Tim Kaine (D-Va.) and Marco Rubio (R-Fla.),
Both parties seem to be in favour of limiting the power of the president to withdraw from NATO.
This doesn't seem to be a simple partisan issue, as this legislation has bipartisan support.