The Greek National Radical Union is formed by Konstantinos Karamanlis.

The National Radical Union (Greek: Ἐθνικὴ Ῥιζοσπαστικὴ Ἕνωσις (ΕΡΕ), Ethnikī́ Rizospastikī́ Énōsis (ERE)) was a Greek political party formed in 1956 by Konstantinos Karamanlis, mostly out of the Greek Rally party.