In many U.S. cities, Latinos and Asians are gaining population share in previously White- or Black-dominated areas. But the vast majority of cities still have white mayors, even those with majority-minority populations. So when do racial minorities gain representation and do they ally to support the same candidates? Paru Shah finds that majority-white and majority-black cities have resisted representation for new immigrant populations. Andrea Benjamin finds that Blacks and Latinos do sometimes vote for the same candidates, but their alliances depend on elite endorsements and racial cues. The results shed light on racial politics in our diversifying nation.