GOP gains in affiliation in Obama era came largely during his first termAnd then down to the second half of the table, which deals with the white subset of the data pool. You've been told that Trump isn't appealing to whites with college degrees. It turns out that is an exaggeration.
Pew finds essentially half of whites with college degrees are Republican, half are Democrats, the difference is 1%. The GOP gets much greater levels of support among whites with some or no college: 57% & 59% respectively. Overall, today's whites prefer Republicans by 54% to 39%.
Eight years ago, whites leaned GOP by only 2%, 46 to 44. One result of the Obama years has been a shift to the GOP by whites. Percentages by which Blacks, Hispanics and Asians prefer the Democrats haven't changed much during that period.
Among whites, men lean toward the GOP by nearly 2 to 1, whereas women are nearly evenly split, giving the GOP only a 1% lead. A majority of every white age group except the under-30 favor Republicans.
The tribalization of American politics proceeds apace.