The administration is preparing for possible evacuation of Americans from Tripoli, Libya as violence escalates in the area.

Dozens are dead after days of fighting between Islamist and anti-Islamist groups.

The U.S. has prepositioned eight Osprey aircrafts, 3 KC-130J refueling aircrafts, and 250 Marine personnel at Sigonella air base in Italy.

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Tuesday is a critical day in an escalating battle between a renegade general and Islamist-aligned groups and politicians. 

Libya's Islamist-led parliament is pushing ahead with holding a vote of confidence Tuesday to approve a disputed new prime minister. The vote would defy demands by the general, Khalifa Hifter, that the legislature disband. 

The vote could escalate one of Libya's worst crises since the ouster and death of dictator Muammar Qaddafi in 2011. Powerful militias allied to Hifter stormed parliament earlier this week and unilaterally declared it suspended, part of a campaign that Hifter says is aimed at breaking the power of Islamic extremists in the country. 

Parliament ignored his suspension declaration, but lawmakers will meet in a secret location for Tuesday's vote for fear of a repeat attack, one lawmaker said, speaking on condition of anonymity because he was not authorized to talk about the arrangements. The state news agency LANA reported that parliament would meet, but did not say where. 

The standoff between Hifter and Islamist factions and militias allied to parliament is threatening to spiral into a battle for power, as militias rally to each side. Hifer's allied militias are positioned along the road to Tripoli's airport, south of the capital, while Islamist-led militias from Libya's third-largest city, Misrata, have mobilized and are positioned to move into the capital after a call by the parliament's head. 

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Adam Ereli, former U.S. ambassador to Bahrain, was on “Shepard Smith Reporting,” where he explained that officials will weigh how serious the threat is and how effectively the U.S. can protect its personnel when determining whether or not to evacuate.

Ereli believes they will wait until the last possible minute to evacuate Americans from the area.

“They’re gonna leave when the bulls-eye focuses on them,” he said.

Watch his interview and Jennifer Griffin’s report above.