The phrase "are likely to elect" is correct and usable in written English.
It can be used when discussing predictions or expectations about future voting behavior or decisions in an election context.
Example: "Based on recent polls, the candidates are likely to elect a new leader by the end of the month."
Alternatives: "are expected to choose" or "are anticipated to select".
In the May presidential election voters are likely to elect a no-nonsense hawk pledged to do whatever is necessary to defeat the rebels.
In Sunday's elections for a new government of this capital redux, Berlin's voters are likely to elect an openly gay mayor, Klaus Wowereit, a Social Democrat.
More people went to the ballpark over the weekend to watch the Yankees play the Red Sox than are likely to elect New York's next chief money man on Tuesday.
And the 36th Assembly District, anchored in Astoria, Queens, is likely to elect a Greek-American assemblyman this year.
More and more, the United States is likely to elect presidents who haven't won the popular vote — awarding the presidency to a party that has no popular mandate.
It is a contest filled with racial politics and, so far, only one thing is clear: Brooklyn is likely to elect its first black Surrogate Court judge, since both women are black.
Creating a Dominican district would have a ripple effect on Senate districts in the Bronx and Westchester County, and senators doubt that a largely Dominican district is likely to elect a Republican.
The number of seats in the House would rise from 435 to 437, because the deal that smoothed the bill through also gives an extra seat to Utah, in the expectation that the western state would elect a Republican to balance the Democrat DC was likely to elect.
These days, citizens reliably vote their party affiliations, splitting their tickets far less often than in the past, so a district with a solid majority of voters from one party is likely to elect that party's candidates year after year.
The centrist Party of the Brazilian Democratic Movement (PMDB), which is likely to elect the most governors and congressmen, has neither fielded its own presidential candidate nor formally backed any other, in order to be able to make deals with whatever parties can help its cause in the states.
"With Hispanics accounting for 46 percent of the total population growth in our state over the last 10 years, this transparent effort to avoid creating even one additional district where this community would be likely to elect its candidate of choice is simply not acceptable," he wrote.
