Sen. Kelly McCarthy : Moscow 's response presents a challenge for NATO leadership . She believes starkly worded statements have n't deterred Russia 's President Putin . NATO needs to ramp up economic sanctions , provide military aid to Ukraine . Russia : failure to act would invite more aggression .
Sen. Kelly Ayotte : Moscow 's escalation presents a challenge for NATO leadership . She says starkly worded statements have n't deterred Russia 's Vladimir Putin . NATO needs to ramp up economic sanctions , provide military aid to Ukraine . Ayotte : Failure to act would invite more aggression .