Premier Kathleen Wynne addresses shortly after she was elected leader of the Ontario Liberal Praty. (MICHAEL PEAKE/ QMI Agency)

TORONTO -- In politics timing is everything.

Pulling the plug on parliament, triggering an election, is a delicate manoeuvre, and one politicians must get right -- or face the wrath of voters.

In 1990, Liberal premier David Peterson did just that by calling a snap election.

It backfired -- and Peterson went from hero to zero, and then-New Democratic Party leader Bob Rae became premier.

In 2002, when Ernie Eves took over the leadership of the PC party from Mike Harris, he hesitated before going to the polls.

In hindsight, that was a mistake. Eves struggled through 2003, a year when the province was beset by the SARS outbreak that killed 44 people.

As if that weren't bad enough, most of the province was shut down for several days by a massive power blackout.

In October 2003, Dalton McGuinty easily defeated the Tories -- and Eves was history.

So should Premier Kathleen Wynne hang in, or should she go to the polls and get her own mandate?

The question is equally tough for the opposition parties -- especially New Democratic leader Andrea Horwath.