British Prime Minister Theresa May under pressure over Brexit plan

The pressure on Britain's Prime Minister to resign is building by the hour.

Theresa May has faced a devastating day of resignations from her ministers over her Brexit plan.

For now, she's digging in but she could be forced into a leadership vote within days.

She fielded a three hour question session in the House of Commons on her Brexit plan, and was hounded from every direction.

Seven of her ministers, including her Brexit secretary, resigned over the plan, and letters from her own party were given to the Conservative Party Secretary saying they'd lost confidence in her leadership.

If 48 letters are submitted, it'll trigger a vote on her leadership.