CLEAN : President Obama set to speak to DNC

The video discusses Obama's legacy as the first black president, highlighting his challenges in progressing the country due to lack of cooperation from Congress. It emphasizes his role as a thoughtful leader whose example will endure. Over time, his accomplishments will be more appreciated, especially given the divisive nature of current US politics.

What does it mean for a leader to be careful and thoughtful, according to the text?

Why might the political climate during Obama's presidency be described as divisive?