President Obama vowed to crack down on gun violence during a press conference at the White House on Tuesday (05Jan16), unveiling proposals to ensure retailers conduct efficient background checks on citizens looking to purchase firearms.

He also delivered an emotional speech about his frustration with the mass shootings that have occurred across the country over the past few years.

However, fervent Republican and gun enthusiast Nugent slammed Obama following the press conference, and expressed his disgust in a heated post on Facebook.com.

Nugent writes, "His ongoing criminal oath violating infringements would not have stopped nor will ever stop any mass shootings or crime that anyone is aware of.

"He is a psychopathic America hating liar. Period... Dear God in heaven America is going down fast! Give NRA (National Rifle Association) mbrshps (memberships) to everyone you know today!!"

He later added on Twitter, "Anybody that denies Obama is the enemy of America is the enemy of America... Your thug constituency rejoices your latest gunscam mr prez (sic)... its (sic) not the guns stupid - its (sic) the engineered recidivism-nobody (sic) believes u (you)."

This is not the first time Nugent has expressed his distaste for President Obama - in a 2014 interview with Guns.com, the rocker called the leader "communist-nurtured subhuman mongrel."

Nugent later apologised for his remarks, and said he wished he had used "more understandable language".