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Russian President Vladimir Putin, Rosneft Chief Executive Igor Sechin and Exxon Mobil Chief Executive Rex Tillerson took part in a signing ceremony at a Rosneft refinery in the Black Sea town of Tuapse, Russia, June 15, 2012. Reuters

Starting at 9 a.m. Wednesday, the Senate Committee on Foreign Relations will begin to decide whether President-elect Donald Trump’s nominee for Secretary of State, Exxon Mobil Corp. Chief Executive Rex Tillerson, is a good fit for America’s top diplomat.

The committee—which is chaired by Sen. Bob Corker (R-Tennessee) and includes former Republican primary candidates Marco Rubio (R-Florida) and Rand Paul (R-Kentucky), as well as former Hillary Clinton running mate Tim Kaine (D-Virginia) and prominent Democratic leader Cory Booker (D-New Jersey)—is expected to bring up the issue of Tillerson’s friendliness with Russia, a country with which the U.S. harbors rather strained relations. In 2013, Russian President Vladimir Putin awarded Tillerson the Order of Friendship medal for his “big contribution to developing cooperation in the energy sector,” according to a Kremlin press release.

Rubio was among many expressing personal distaste in the apparent friendliness between Tillerson and Putin, with whom the U.S. has struggled to maintain peace along Russia’s border with Ukraine, where Moscow has instigated a separatist movement and annexed the Crimean peninsula, as well as in Syria, where Russian assistance of the Bashar Assad regime has led to thousands of civilian casualties.

Curious as to whether the senators will cover Tillerson’s vocal opposition to U.S. sanctions against Russia and his company’s operations in the country, along with dozens of others? You can tune in to C-SPAN 3, PBS NewsHour or the Foreign Relations Committee’s website to watch the hearing live.

While Exxon recently announced that Tillerson would be divesting his interests in the company he has presided over for about a decade, selling his more than 600,000 shares of the company and giving up 2 million that he would’ve gained upon his planned March 2017 retirement, many worry that his 41-year tenure at the Irving, Texas-based oil giant may be enough to sustain his stake in the company’s interest. He’s never worked anywhere else.

Corker, meanwhile, has called him a “very impressive individual.” Other supporters of Trump’s pick have touted Tillerson’s experience trotting the globe and arranging drilling and exploration deals with an array of foreign governments—including, through a subsidiary, those of Iran, Sudan and Syria.