He needs to get to a psychiatrist and start taking medication
Megalomania can be treated!
Treatments for megalomania depend upon the underlying condition causing it, but can include medication and psychotherapy.
Four conditions are associated with this state, where individuals believe themselves omnipotent, have a deluded sense of possessing extraordinary power, or exhibit grandiosity, which is a view of personal superiority and disdain for others.
These conditions are narcissistic personality disorder (NPD) antisocial personality disorder (APD), schizophrenia, and bipolar disorder. Treatment differs in these conditions, and antisocial personality disorder is not presently considered treatable.
Bipolar disorder may have megalomania as a feature when people are in a manic state. Some schizophrenics have delusions of grandiosity, believing they have exceptional power.
In these two conditions, states of megalomania and grandiosity are especially dangerous because individuals may make decisions based on a faulty perception of personal power.
A schizophrenic might stand in front of a car believing it cannot hit him, and the bipolar person could sleep with numerous people without recognizing the consequences to a marriage.
In one sense, these disorders are easier to treat because both will respond to medication. Treatments for megalomania in schizophrenia and bipolar directly address the underlying chemical dysfunctions responsible for the disorders.
Mood stabilizers can help return bipolar sufferers to a normal mood, and schizophrenics may be treated with antipsychotics. Both conditions additionally benefit from ongoing therapeutic support and psychoeducation.
Are you talking about Gingrich or Santorum?