The first chief of the Secret Service was William Wood.
Secret service
Secret service agents are trained to take a bullet for the President if necessary.
Secret Service agents. They are employees of the Treasury Department.
Secret Service Agents
In regards to the President's security detail, essentially yes. Where ever the President goes he is accompanied by a certain number of secret service agents.
The sole purpose of the Secret Service agents are to protect the president. Whoever protects them is irrelevant and quite frankly not needed. People don't plan assassination to kill Secret Service agents, because of how quick people can act. With only 1 (maybe 2) shot, you need to kill the most important figure there, which is usually the president.
They are secret service agents there to protect the president
The secret service does not live in the White House. Actually it would be more appropriate to say that secret service agents do not live in the White House. The US Secret Service is tasked with Presidential security and there are numerous agents on duty at all times, at the white house and wherever the president is or will soon be. Like any other job, when the agents are not on duty, they go home to their families. If they are traveling with the president then they are provided with hotel rooms.
The number of CIA agents specifically assigned to protect the president is not publicly disclosed, as it is sensitive information related to national security. However, the primary responsibility for presidential protection falls to the Secret Service, not the CIA. The Secret Service has a dedicated team that provides security for the president and other high-profile officials. CIA agents may assist in other capacities related to intelligence and threat assessment but do not directly protect the president.
US Treasury Dept
none
Secret service agents dress appropriately for the situation.