Which branch of govt does the president lead

Executive branch

Explanation:

1) the andrew carniage's purchase and renovation of skibo castle have been very good and auspicious for the local people of dornoch firth, scotland because this is a turistic attraction for many people who would want to know the castle, the local people would take advantage about this.

2) yes, it could.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.