LOS ANGELES (AP) — Democratic presidential candidate Bernie Sanders threatened a floor fight over rules and platform planks at the party's summer convention on Friday, warning the Democratic National Committee not to stack the convention's standing committees with supporters of Hillary Clinton. Sanders wrote in a letter to Democratic National Committee Chairwoman Debbie Wasserman Schultz that the makeup of the standing committees that consider the party's platform and rules should reflect the level of support that he and Clinton have received during the 2016 primaries and caucuses. The Vermont senator has vowed to campaign through the end of the primary season in mid-June and advocate at the convention for his policy goals, which include fighting wealth inequality and overhauling the campaign finance system.