Here's what happened at the Iowa caucuses, and what the candidates have to say

Democratic hopeful Pete Buttigieg declared victory in the Iowa caucuses early Tuesday, despite a botched election process that delayed the release of the state's results. The confusion was caused by a lack of official results in Monday's caucuses, the nation's first contest in the 2020 presidential race. The Iowa Democratic Party said late Monday that officials had found "inconsistencies" in the voting data and attributed the problem to a "reporting issue."