beat president trump. he was an early supporter of president obama's presidential campaign. the endorsement comes as harris prepares for that first debate of course this week in miami. it will give her another chance why her background as a prosecutor sets her apart from other competitors. kyung lah reports. >> reporter: drumming up support in south carolina ahead of this week's democratic debate. kamala harris used the words of the courtroom to tout her record as a prosecutor. >> so let's read that rap sheet shall we? he asked black americans, he said what do you have to lose? well, we know civil rights investigations are down and hate crimes are up. we have a lot to lose. >> reporter: her argument on why she is best positioned to make the case against the president. >> let's talk about looking apthat rap sheet where he's embraced dictators like kim jong-un and putin and taken