A preliminary look at voter registration statistics for the City of Whittier, provided by the Secretary of State's office proves that Whittier does not have a Democratic majority.
Over all the stats which could change as the election approaches:
Democratic Party: 47% (a plurality but not a majority as some have claimed falsely)
Non Partisan: 21% Also called No Party Preference, Non partisans have traditionally pulled from the Republicans but in recent years more and more Democrats have been abandoning the party to go non partisan.
Republican Party: 25% At a quarter of all Whittier voters are registered Republicans and telling from the last year they are a very vocal group. They appear to be more vocal and energized that most of those who identify as Democrat which 47% or slightly less than half the city.
While the number non partisan voters has been increasing at both parties expense in recent years, this year the Non Partisan voting block saw a slight decline, going down by 4 voters who either switched or rather adopted party affiliation or moved out of Whittier.
Despite the fact they do not represent the majority of Whittier voters, Democrats saw an increase of 309 new voters in 2021 so far.
Republicans also saw an increase but a significantly smaller 30 new voters. Republicans have pretty much abandoned voter registration in Whittier to the Democrats in recent years.
This is just a preliminary look and the stats are going to change as more people register to vote as they become eligible and those include high school and college students and newly naturalized US citizens. If Republicans were to switch tactics with regards to DACA recipients, at least one quarter to half of whom come from conservative backgrounds, they could, in theory, cut into the Democrat's lead in voter registration. But for that to happen, Republicans would first need to support changing the immigration law to make it simpler for DACA recipients to acquire US citizenship so they can vote for conservative candidates.
Data from think tanks that study the societies in Latin America indicate that most Central American immigrants and refugees tend toward the conservative end of the spectrum which makes them good candidates for becoming new Republicans.