Complex sentence: Its support base contracted further in the general election of January 1933 (48 seats compared to Fianna Fáil's 77) as it failed to counter de Valera's populism and was increasingly labelled the party of the middle class.
Split into simpler sentences: Its support base contracted further in the general election of January 1933, winning 48 seats compared to Fianna Fáil's 77. Increasingly, the party found itself to counter de Valera's populism and was increasingly labelled the party of the middle class.