Question

Why is it important that troops can only remain in a foreign country for 60 days unless congress approves?

it shows that sending troops to another country is expensive.
it allows congress to debate the funds for the military.
it stops congress from checking the power of the president.
it prevents the president from having too much power.

Answer 1

prevents the president from having too much power. i would argue, because if not them the president can start wars without congresses approval. 

Answer 2

It prevents the President from having too much power.