Here are 16 candidates who could run for Democrats in the 2020 presidential election

President Donald Trump may only be a few months into his tenure, but Democratic leaders are already preparing for the 2020 election.

The next 1,000-plus days promise an uncertain future for a party that saw Americans choose a bombastic Republican candidate with little political experience.

But some senators and city leaders are already coming out as clear contenders in the next election.

Here are some of the Democratic candidates who could run - or have a strong base of supporters who want them to run - for president in 2020.