It appears the regimes of US and Turkey are two Machiavellian peas in NATO's pod. Each have somewhat different agendas, but their agendas are complementary regarding Syria. Both are up to their necks in lies about what they are doing in Syria, but both want to crush the Syrian government.
Cunningham's assessment about their collusion seems correct.
Given the grim prognosis for the regime-change conspirators, Turkey and the US appear prepared now to ratchet up direct military intervention. In short, they are moving to fully-fledged war on Syria.
Erdogan seems to be using the failed coup in his country in mid-July as added leverage on Washington. Reeling from Turkish accusations that the US was somehow complicit in aiding the coup attempt (probably overblown), Washington seems keener to accommodate Erdogan’s demands over Syria.