When you look at this you see one reason besides principle Ryan might try to run away from Trump.
Percentage of Latinos by Congressional District as shown by the Pew Research Center:
Arizona 2 28.3% of population 21.6% of eligible voters Martha McSally (R)
California 21 75.6% of population 39.4% of eligible voters David Valadao (R)
California 22 49.6% of population 31.8% of eligible voters Devin Nunes (R)
California 23 40.8% of population 27.3% of eligible voters Kevin McCarthy (R)
California 8 40.5% of population 27.0% of eligible voters Paul Cook (R)
California 42 40.6% of population 26.9% of eligible voters Ken Calvert (R)
California 10 44.5% of population 26.0% of eligible voters Jeff Denham (R)
California 25 38.7% of population 25.2% of eligible voters Steve Knight (R)
California 39 35.2% of population 24.7% of eligible voters Ed Royce (R)
Florida 26 74.0% of population 59.0% of eligible voters Carlos Curbelo (R)
Florida 27 83.1% of population 57.5% of eligible voters Ileana Ros-Lehtinen (R)
Florida 25 75.7% of population 50.8% of eligible voters Mario Diaz-Balart (R)
New Mexico 2 53.6% of population 40.3% of eligible voters Steve Pearce (R)
Texas 23 72.2% of population 52.4% of eligible voters Will Hurd (R)
Texas 27 53.7% of population 43.9% of eligible voters Blake Farenthold (R)
Texas 11 39.9% of population 29.0% of eligible voters Mike Conaway (R)
Texas 19 36.7% of population 27.2% of eligible voters Randy Neugebauer (R)
Texas 21 33.2% of population 26.7% of eligible voters Lamar Smith (R)
Sixteen of eighteen are over 25% Latino eligible voters, eight of eighteen over 30%, four over 50%.