Russia 's aggression in Ukraine certainly presents a threat to NATO . Sen. Kelly Ayotte : Moscow 's escalation presents a challenge for NATO leadership . The U.S. and its allies have been conducting air strikes against ISIS targets in Iraq since August 2014. NATO needs to ramp up economic sanctions , provide military aid to Ukraine . Ayotte : Failure to act would invite more aggression .
Sen. Kelly Ayotte : Moscow 's escalation presents a challenge for NATO leadership . The U.S. and its allies have been conducting air strikes against ISIS targets in Iraq since August 2014. NATO needs to ramp up economic sanctions , provide military aid to Ukraine . Ayotte : Failure to act would invite more aggression .