After the Republicans lost the 2012 presidential election, in large part as a result of their disregard of minority voters, many of them hispanics, the GOP decided that they needed to widen their base and appeal to some of those voters. The idea was to show that Republicans were not anri-minority, anti-hispanic, or anti-immigrant. Many of it's 2016 presidential candidates were, in fact, in support of immigration reform, including Senator Marco Rubio who later made a 180 degree turn on the issue, despite his often used immigrant family rhetoric.
However, the minority and immigrant inclusion effort soon fell by the wayside, not in small part as a result of Trump's anti-immigrant and anti-hispanic rhetoric which has found loud and vociferous support in the parties extreme right wing. And so, the Trump Effect has been the galvanization of the anti-imigrant and anti-hispanic elements in our society, and the identification of the Republican Party with that same point of view, despite the fact that, in truth, many of its candidates do not agree with that position.
The other side to the Trump effect has been a significant rise in hispanic voter registration and solidification of their support for Democrats.
Whether the Trump Effect will end up helping or hurting the Republicans or the Democrats remains to be seen, but one thing is certain, the effort to bring hispanics into the Republican Party seems, at least temporarily, on hold.