One of the most contentious fights in the lead up to Thursday's passage by House Republicans of legislation to repeal and replace the Affordable Care Act has been how to deal with patients who have pre-existing conditions, such as cancer, asthma, or diabetes.

To help sway Republicans who were on the fence about the bill, GOP leaders and the White House agreed to include an extra $8 billion to help patients with pre-existing health problems. That last-minute amendment won over several crucial votes and gave Republicans momentum heading into Thursday’s vote.

Just in case there are those who do not understand what pre-existing conditions are,  Democratic U.S. Senator Sherrod Brown provided answers in an epic, lengthy, Twitter rant from A to Z: 

Publications like the New York Daily News and Salon have picked up on Brown's Twitter list of conditions that could cause someone to experience higher costs under the Republican healthcare plan. has analyzed the Republican American Health Care Act to see which claims are true and which are false when it comes to the pre-existing conditions debate.