Obvious tactics.
USA Today said:
"Trump's approval rating among black men increased in the week between April 22 and April 29, according to a Reuters poll. West made posted his series of tweet voicing support for Trump on April 25. It jumped from an 11 percent approval on April 22 to 22 percent on April 29. Among the total black community, it also nearly doubled, but the numbers were lower. His approval among all blacks increased from 8.9 percent to 16.5 percent."