Sen. Joe BidenJoseph (Joe) Robinette BidenOvernight Tech: FCC won't delay net neutrality vote | Google pulls YouTube from Amazon devices | Biden scolds social media firms over transparency Medicaid funds shouldn't be used to subsidize state taxes on health care Biden hits social media firms over lack of transparency MORE (D-Del.) took aim at John McCainJohn Sidney McCainGOP strategist donates to Alabama Democrat Meghan McCain knocks Bannon: 'Who the hell are you' to criticize Romney? Dems demand Tillerson end State hiring freeze, consult with Congress 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."