<p>That later swelled to a group of 21, was endangered almost immediately after its announcement Thursday evening, after comments Biden made in a news conference on the deal angered Republican senators.</p>

That later swelled to a group of 21, was endangered almost immediately after its announcement Thursday evening, after comments Biden made in a news conference on the deal angered Republican senators.

Remember, it's not an on and off switch Part 6

"Behaviors take time to implement and adopt. They also take time to un-adopt," says Abraar Karan, an internal medicine physician at Brigham and Women's Hospital.

Share Remember, it's not an on and off switch Part 6

Sign up to save your podcasts

Remember, it's not an on and off switch Part 6

Remember, it's not an on and off switch Part 6