A new poll from Latino Decisions finds Democrat Hillary Clinton easily besting Sen. Marco Rubio in a potential presidential match-up among Hispanic voters. Clinton draws 66% of Hispanic voters, while Rubio garners just 28%. Against Vice President Joe Biden, Rubio trails 60-28%. If Rubio's level of support looks familiar, it's probably because Mitt Romney got 27% of the Hispanic vote last November. Many GOP leaders have convinced themselves that supporting comprehensive immigration reform, with a path to citizenship, is critical in broadening the party's appeal to Hispanics. Sen. Rubio has been a tireless advocate for this position for months and...