German politician Ludwig Quidde used this man's name for a metaphorical pamphlet attacking Wilhelm II. He came to power with the backing of Praetorian prefect Macro, and he later engineered the first 
German politician Ludwig Quidde used this man's name for a metaphorical pamphlet attacking Wilhelm II. He came to power with the backing of Praetorian prefect Macro, and he later engineered the first deification of a woman in Roman history after the death of his sister Drusilla. A rumor reported by Suetonius and taken as fact by Cassius Dio says that this man intended to make his horse Incitatus a consul. For 10 points, identify this successor of Tiberius, whose nickname meant "little boot," a notoriously megalomaniacal Roman emperor.
German politician Ludwig Quidde used this man's name for a metaphorical pamphlet attacking Wilhelm II.
{Caligula} [or {Gaius Caesar Germanicus}]