Baku-APA. The front-runners for the nominations in the US presidential race are aiming to extend their leads on Saturday, APA reports quoting BBC.
Republicans are holding caucuses or primaries in four states, with Democrats voting for their candidate in three.
Former Secretary of State Hillary Clinton leads the Democrats' contest while billionaire Donald Trump is ahead in the Republicans' race.
Efforts by Republicans to slow Mr Trump's march have so far failed.