Simplify the following text for a Grade 9 native English-speaking person.
Original: To strengthen his position against the opposition in the DÃ il and Seanad , de Valera called a snap election in January 1933 and won 77 seats , giving him an overall majority .
Simplified: de Valera called a general election in January 1933 and won 77 seats , giving him an overall majority .