system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are Republican candidates so against Planned Parenthood?

As the title suggests. Thank you.
gpt
Planned Parenthood is an organization of clinics offering primary care and sexual health services on a sliding scale cost (making them affordable to low-income populations). Services include things like cancer screenings and physical exams. It is also, however, the largest provider of U.S. sexual health services like pregnancy tests, contraceptives, STD tests, and - most controversially - abortions. 

Most Republican candidates are religious, typically Christian, and abortion goes against their religious values. Therefore, defunding the abortion-offering Planned Parenthood supports their goals. About 1/3 of Planned Parenthood's funding comes from federal family planning grants. While this money cannot legally be used for abortions and is technically supposed to support the organization's other services, some argue that leftover funds may be used for abortions. Others are against supporting an abortion-granting organization in any way.