But CNN's John Avlon explains how the amendment and the debate around it get a lot more complicated from there.

The text is relatively recent born right after John F. Kennedy died brought up by members of administration including his brother Bobby

who shuttered to think what might have happened had the president been only incapaciated in Dallas.

请问老师：...recent born...这里怎么理解和分析？还有shuttered to think 什么意思呢？