President Donald Trump’s pick to lead the U.S. department of health will likely face another round of criticism about his stock trading and questions about plans to overhaul Obamacare at a crucial Senate committee hearing that could clear the path for his nomination.

Representative Tom Price, a Georgia Republican, is appearing Tuesday before the Senate Finance Committee, the only one that votes on whether to send his nomination to the full Senate for consideration.

At his first hearing last week before the Senate health committee, Price was grilled by Democrats who have called for an investigation into his investments in medical stocks while handling health-related legislation. He didn’t provide details on how to replace Obamacare, a law that expanded coverage to 20 million people in the U.S. since it was passed in 2010.