The idea that diplomacy with rogue regimes is cost-free is a relatively new idea, one that may sound good in the abstract but is less durable in reality. Policymakers often advocate diplomacy with rogue rulers and even terrorist groups because other options seem unattractive. As our recent experience in Afghanistan and Iraq shows, war extracts a tremendous price not only in terms of blood and treasure but in terms of national morale as well. The American public is exhausted by these conflicts and wondering if their price was worth paying.
Sanctions don't work because dictators don't care about their people.
Putin is a modern-day Machiavelli, unapologetic about saying and doing whatever is necessary to regain the glory and respect he believes the Soviet Union enjoyed. With his tireless efforts to engage and pour emollients on fundamental disagreements, Obama has acted as a modern-day Chamberlain. Simply declaring the Cold War over does not make it so unless both parties seek a new beginning. Obama sincerely wants peace, but so long as Putin seeks the restoration of an imperial Russian past, peace will never occur. Hitting the reset button should not mean allowing an opponent to use diplomacy to wage war by other means.
This is the first author to link Obama and Chamberlain that I have come across.