Rex Tillerson, CEO of ExxonMobil and President-elect Donald Trump’s pick for secretary of state, could face a challenging confirmation. Sens. John McCain and Marco Rubio are already raising red flags over his ties to the Kremlin and close relationship with Vladimir Putin. Tillerson, who has an estimated net worth of at least $150 million, is the first person nominated for the position in modern history with no public sector experience. NBC News chief foreign affairs correspondent Andrea Mitchell reports for TODAY.