Too many here and unassimilated.
We need to reduce the numbers significantly so those that come must integrate into society and not gravitate to communities of similar peoples and cultures.
How will we know when we have been successful? When Spanish is not being spoken in public, all signs are in English, Hispanics are learning Spanish in HS as a second language, and a majority of Hispanics vote Republican.
Republicanism(conservative) is Americanism.
A truly assimilated immigrant embracing Americanism will be voting Republican.