At services Sunday morning, a pastor misidentified Sen. Elizabeth Warren’s husband. The day before, the man introducing Warren at the Black Church PAC presidential candidate forum in Atlanta inaccurately said she was from the “great state of New Hampshire.”

The mistakes were minor, but they show the Massachusetts Democrat is struggling to introduce herself to black voters, even after eight months of nonstop campaigning.

Other candidates, including Sen. Bernie Sanders (I-Vt.) and South Bend, Ind., Mayor Pete Buttigieg, also tried to expand their appeal among nonwhite voters this weekend, as they campaigned in South Carolina and Georgia.

Black voters are key to winning South Carolina, the fourth nominating contest in the Democratic calendar, along with the slew of Southern primaries where African Americans also represent large shares of the vote. Hillary Clinton won the 2016 Democratic presidential primary because of her support among black voters.

Buttigieg, whose support among blacks has been too small to measure in some polls, spent his Sunday morning glad-handing at Bethel AME church in Georgetown, S.C. Later, during an interview on CNN’s “State of the Union,” he made an appeal to blacks, saying President Trump’s supporters are “looking the other way on racism.”

Sanders used his trip to release a wide-reaching criminal justice plan. “This state is a state which has an even more broken criminal justice system than the country, and the country is pretty bad,” Sanders said. […]