The claim that Republicans added nearly 50,000 voters in California in one month while Democrats added just 190 voters is mostly true because multiple recent sources report a significant increase in Republican voter registrations and a decline or minimal gain in Democratic registrations, though exact monthly figures vary slightly across reports.
Republicans add nearly 50,000 voters in California in just one month. Democrats added just 190 voters.

Democrats still dominate California, but their voters have drifted to the right - Opinion
Source: calmatters.org
Key Evidence
KCRA reported Republicans gained about 46,000 registered voters statewide while Democrats lost 30,000.
kcra.comkcra.comRepublicans gain ground among registered voters across California
California Globe confirmed Republican registration increases across all counties.
californiaglobe.comcaliforniaglobe.comFix California Increased Republican Registered Voters
Other sources note Democrats remain dominant but have seen voter shifts and minimal registration growth recently.
calmatters.orgcalmatters.orgDemocrats still dominate California, but their voters have drifted to the right
ppic.orgppic.orgFive Fast Facts on California Voters
What the Evidence Shows
Recent data and reporting from multiple sources indicate that Republicans have indeed gained tens of thousands of registered voters in California recently, with figures around 46,000 to 50,000 new Republican registrations statewide over a short period. For example, KCRA reported Republicans gained approximately 46,000 registered voters statewide while Democrats lost about 30,000.kcra.comkcra.comRepublicans gain ground among registered voters across California Similarly, California Globe noted increased Republican registrations across all counties.
californiaglobe.comcaliforniaglobe.comFix California Increased Republican Registered Voters
Meanwhile, Democratic registration numbers have either declined or increased only marginally during comparable periods. The claim that Democrats added just 190 voters in the same timeframe aligns with the narrative of minimal Democratic gains or slight losses but is less precisely documented in the sources. Overall, the data supports a substantial Republican registration surge contrasted with very limited Democratic growth in recent months.
However, exact monthly registration numbers can vary depending on the reporting period and source methodology. The claim is therefore mostly true but should be understood as an approximation rather than an exact count.