Government and Binding Theory/Relativised Minimality
After having seen so many rules regarding movement, it's about time we rid ourselves of another outdated concept we've grown out of: transformation rules. Rather than giving concrete rules on how constituents are moved, we now prefer to assume at first that we can move anything, anywhere, then use a set of rules that restrict movement. Since we've already done the boot thing, let's try something new. Let's use... Donald Trump.
Obviously, movement doesn't just happen all the time as long as they conform to bounding theory. There needs to be 'motivation' for movement. Case theory gives this motivation...