Republican presidential nominee Mitt Romney is about to get a strongly-worded letter from a concerned boy.

Jackson Ripley, 12, was watching political news coverage with his mom about health care, and asked questions concerned for his sister, aged 7, who has a life-threatening medical condition.

Shortly after sister Kennedy was born, she developed a hemangioma – an abnormal, raised tumor of blood vessels.

His mother Lindsay encouraged Ripley to write a letter to the man who would oppose Obama’s universal care. She later passed it to The Huffington Post.

The letter begins: ‘Dear Governor Romney, I’d like to say congratulations on winning the Republican nomination. But, I wish you stayed in Massachusetts.

‘Your plan for America isn’t what we need, and wouldn’t hurt us more than it would help.’

Ripley called out the Republican for his health stance, and especially with regard to patients with pre-existing conditions.

He also slammed the politician for his social conservative beliefs.

‘Your domestic plans (birth control, gay rights etc) are horrible!,’ he said. ‘Women should get to manage their own health, and if you wonder why you’re not appealing to many women voters, rethink your birth control and women’s rights plans.

‘And people should be able to marry whoever they want.’

The letter ends: ‘We built this country so people could have freedom, and not have religious beliefs control them to that length.

‘This country was in no way built on any religion, so we should not create laws that repress the American people in a religious way and hurt our most vulnerable.

‘Sincerely,

Jackson Ripley, age 12.’