The US is expected to eventually become majority non-white...

However, typical political disagreements (e.g. on economic policies) seem to be less divisive than those based on race or ethnicity, which tends to be more of a hot button (probably because race or ethnicity is based on who you are, not what you do). Note that members of minority groups can be conservative on many not-race/ethnicity-related issues (on some such issues, some minority groups are more likely to be conservative than white people), but such affinity to conservative politics based on that often gets overridden when conservative politicians do or say things seen as unfriendly to minorities.