That is still considered a landslide in the world of politics. Despite the attempts by conservatives to see some light at the tunnel, the conservative ideology will always be a rump party in communities of color.
I made no comments regarding whether it is a landslide or not. I am pointing out that your correction of the GP comment that "the Republican party is making inroads into the working class" should be "to the white working class". I feel that increases of 80% and 57% are significant enough to count as making inroads. Other data includes Vietnamese support increasing from 32% to 48%, handily beating the 36% Biden support. Approval from 44%~48% of a community may not be the majority, but complacent attitudes such as yours is the way that such percentages continue to increase.