Karzai must win more than 50 percent of the vote to avoid a runoff.

Polls show Ossoff hovering in the low 40s, not enough to avoid a runoff.

He was able to avoid a runoff vote because he received over 50%.

Mnangagwa needed to win by more than 50% to avoid a runoff vote.

She needed 40 percent to avoid a runoff.

Lincoln finished first in the initial round of voting last month, but failed to avoid a runoff.

He is facing a growing protest movement and needs to consolidate his core support to avoid a runoff.

Landrieu needed more than 50 percent of the vote to avoid a runoff election and win another four-year term.

That just crossed the 50 percent threshold to avoid a runoff later this month between the top two contenders.

The election is non-partisan, and the winner must get 50 percent of the vote plus one to avoid a runoff.

After Afghan President Hamid Karzai fell short of the 50 percent required to avoid a runoff, a second round was hastily scheduled.

In Alabama on Tuesday, Shelby easily defeated four challengers to take 65 percent of the vote, enough to avoid a runoff election in April.

To avoid a runoff, Rousseff would have to win more than 50 percent of votes in the first round, something polls suggest is unlikely.

Ms Fernandez's margin of victory, seen as the largest in the history of Argentine democracy, will allow her to avoid a runoff vote next month.

Emanuel received about 45 percent of the vote last month, short of the 50 percent level needed to avoid a runoff.

To avoid a runoff, Correa needed a simple majority or 40% of the vote plus a 10-point margin over the runnerup.