Sen. Joe BidenJoseph (Joe) Robinette BidenReport: Biden to write foreword for memoir by transgender activist Biden to Alabama: No more extremist senators Kasich, Biden to hold discussion on bipartisanship MORE (D-Del.) took aim at John McCainJohn Sidney McCainRubio asks Army to kick out West Point grad with pro-communist posts The VA's woes cannot be pinned on any singular administration Overnight Defense: Mattis offers support for Iran deal | McCain blocks nominees over Afghanistan strategy | Trump, Tillerson spilt raises new questions about N. Korea policy MORE over Iraq Monday, saying the Arizona senator and longtime military officer's Iraq policy fails to understand the reality of the situation.

Biden said McCain has a "total lack of understanding" and "no notion of what is going on" in Iraq.

"I don't understand anything about John's policy here," Biden said during a conference call with reporters. "I don't know what he is talking about except more of the same."

Biden said McCain's Iraq policy would "prevent" the US military from fighting resurgent al Qaeda and Taliban forces in Afghanistan and shows no "larger strategy" to fight terrorism beyond Iraq's border.

In an op-ed in Monday's New York Times, Obama called for a 16 month phased redeployment out of Iraq to free up troops to fight resurgent Taliban and al Qaeda forces in Afghanistan.

Biden called Obama's plan "profoundly right" and said it is "more in line with what our military needs are and what our military thinks."