Does Putin plan to test NATO in Latvia?

Paul Goble, Estonian World Review (Canada)
Given Putin’s past declarations about what he sees as the illegitimacy of NATO’s expansion eastward after 1989 and especially the inclusion of Estonia, Latvia and Lithuania as member states and Russian subversion in Latvia already, it is now an open question whether the Kremlin leader may try to test and weaken NATO by further actions there. That test would not necessarily take the form of an attempt to seize a portion of Latvia or force Riga to withdraw from the alliance, although some in Moscow might like to do either or both of these things.