The veteran Michigan Democrat chairs the Senate's Permanent Subcommittee on Investigations and is known for his aggressive and lengthy interrogation of witnesses he brings before the panel after his staff conducts detailed investigations.
The subcommittee's latest probe found that Apple used a web of foreign subsidiaries to shelter billions of dollars in overseas income from U.S. taxes.
Given the huge popularity of Apple's products and its standing as one of the world's largest and most successful companies, the investigation's findings, released Monday, are drawing huge attention to Cook's appearance at the hearing.
Here's a few things to watch for:
1) Levin can be relentless as a questioner, meticulously moving through detailed questions in hearings that can last hours.
Cook and the other Apple executives are unaccustomed to congressional testimony. They're definitely unaccustomed to Levin's prosecutorial-style interrogation. How will they handle the pressure?
A tart reply to Levin can bring down his wrath and also end up as the leading sound bite from the hearing. That could end up hurting Apple's reputation.
2) The panel's top Republican, Sen.
But will any of the other panel's
So will any of the panel's GOP members come to the defense of a company that is not accused of anything illegal in using tax laws to shelter large amounts of its income from high U.S. tax rates?
3) Cook is expected to push
Apple could end up as the poster child for corporate tax abuses or for the need to overhaul the tax code. How Cook and his fellow Apple executives handle the hearing will help determine that.