Congress. The constitution states Congress must approve it.
The president is in complete control, he doesn't need approval
recess appointments
Presidents do not need the approval to send troops anywhere in the world. However, generally the president attempts to have a consensus with Congress when sending troops somewhere.
nope
The Senate must confirm apppointments made by the President.
if he like he can and if he dont like
'effect' ... the Senate
Congress does not have to give approval to appoint the President's choice for Secretary of State. However, a confirmation hearing takes place before the Senate Foreign Relations Committee.
yes anywhere but you need the approval of the president first
The writers of the constitution likely put rules in place that require the president to have approval of the senate so that the president is making a reasonable actions, and to prevent something that could negatively affect the country.
President Woodrow Wilson in 1914 proclaimed that America would be neutral and not enter the world war in Europe (today that war in called World War 1). Eventually, America did have to enter the war, but in its early years, most Americans were opposed to doing that.
no notice is needed if there is an emergency for maintenance need. THE landlord may enter for any maintenance without tenant's approval after 24 hour notice.