"To call an election" means to officially announce and schedule an election to be held, giving people the opportunity to vote and choose their representatives or leaders. Full definition
A rainbow coalition would have been hugely unpopular in the right - wing press, but it could have passed wholesale reform of British politics and then called another election in two years. (politics.co.uk)
Indeed she will not call an election partly because of her popularity. (totalpolitics.com)
Looks very favourable but still time left and stupid to call the election before the vote is over. (ukpollingreport.co.uk)