Final answer:
A weakness of Andrew Johnson as president was his stubbornness and aversion to compromise, which led to difficulties in working with Congress. Furthermore, his beliefs in white supremacy and lack of support for equal rights for freedmen caused further tension with Congress.
Step-by-step explanation:
A weakness of Andrew Johnson as president was his stubbornness and aversion to compromise. This made it difficult for him to work with Congress and led to a deep rift in Washington. Additionally, Johnson's belief in white supremacy and his lack of support for equal rights for freedmen put him at odds with many in Congress.