Washington | US Vice President Kamala Harris faces a key dilemma at her Democratic Party’s all-important national convention this week: whether to focus on policy or personality in the battle for the White House against Donald Trump.

Political strategists are waiting to see which direction she takes at the Chicago convention, a four-day televised event that sets up the next 80 days of the presidential race and introduces Harris to millions of voters who may know little about her or what she stands for.