Yes, it seems they can, since Truman started the practice, The Constitution seems to make it clear that only Congress can declare war, but recent presidents send in troops without declaring war and expect Congress to go along and find the money to keep them there as long as needed and replenish the arsenal . ( Already, Obama has okayed the firing of 125 Tomahawk missiles at $1 million each and lost a $30-million war plane. )
War Powers Act
The president has no money for troops without the approval of Congress, so he would be limited to the troops who are already funded and any expenses incurred in military operation would have to be paid with money that was appropriated earlier.
War Powers Act
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.
With the approval of Both houses of Congress.
Yes, he could not go to war with out congress approval. He could, but only for 90 days!
War Powers Act
The Executive branch is in charge of enforcing the laws (while the Legislative branch writes the laws and the Judicial branch determines the legality of the laws). The President can issues executive orders that do not require the approval of Congress. The President can order troops but can not declare war without Congress' agreeance. The President can appoint Supreme Court judges (with Congress' approval) as well as many other high-ranking officials (including all working in his office - without Congress' approval). The President is also very much in charge of all foreign affairs, nearly exclusively - with Congress' agreement.
The Marine Corps
As commander in chief of the armed forces
As commander in chief of the armed forces
The president and congress make the final decision as to where troops are deployed. The president has a 90 day window where he can deploy troops without congress consent but after that congress must approve of the deployment. I'm drunk right now.