What powers does the Constitution provide the three branches of government, and how have those powers changed since 1865?

AMH 2020 DSC US History Discussion

What powers does the Constitution provide the three branches of government, and how have those powers changed since 1865?  How does each branch checks the power of the other branches?  Discuss whether you believe the relationship between the three branches are successful today and what, if anything you might change.

https://supreme.findlaw.com/legal-commentary/the-us-supreme-court-and-the-imperial-presidency.html

http://desart.us/courses/3150/powercases.html

https://www.history.com/news/franklin-roosevelt-tried-packing-supreme-court

https://www.trumanlibrary.gov/education/three-branches/congress-and-courts-keeping-balance

https://www.huffpost.com/entry/the-supreme-court-vs-cong_b_1561123

https://www.brookings.edu/blog/order-from-chaos/2020/12/18/war-powers-in-the-era-of-joe-biden-and-lloyd-austin/