 This surprise result was followed by the unsuccessful leadership challenge by Fine Gael deputy leader Richard Bruton against Enda Kenny; a period of instability followed, during which Labour challenged Fine Gael for first place in the polls.As the economic crisis continued to worsen in late 2010, Fianna Fáil fell below 20% support, and did not recover from this in any opinion polls taken before the election.In November 2010, the EU/IMF rescue, followed by an historic defeat at the Donegal South-West by-election, marked a new period in opinion polling.