American voters who fear a Donald Trump presidency but are not totally convinced by the idea of Hillary Clinton in the Oval Office have turned to Google in search of a third option.

According to new data from Google Trends, the search engine saw a significant spike in searches for “3rd party candidate 2016” since the Republican National Convention kicked off on Monday.

The data appears to show a growing sense of unease in the American electorate as the Nov. 8 election day looms.

The unique search hit its highest point on Wednesday, the same night that Ted Cruz told Americans to “vote their conscience” and was booed off the stage.

The four states most interested in the search included three blue states -- Colorado, Michigan and Washington -- and Missouri, which has been won by Republicans in the last four elections.

Google Trends previously made news in the U.S. election junket after a noticeable spike in searches was recorded for Jill Stein, the presumptive presidential nominee for the U.S. Green Party.

Searches for Stein came as Democratic candidate Bernie Sanders ended his presidential run, and the data has been seen as a warning sign to Hillary Clinton that some progressive voters could intend to cast ballots for the third-party candidate.

Other possible third-party candidates include Tom Hoefling for the far-right American Independent Party, and Gloria LaRiva, leader of the Party of Socialism and Liberation.