Bret Chiafalo, a Democratic elector from Washington state who co-founded the anti-Trump group Hamilton Electors, said Sunday he remained hopeful about Monday’s Electoral College vote. “I think enough Republican electors are going to put country before party,” he said.
Bret Chiafalo, a Democratic elector from Washington state who co-founded the anti-Trump group Hamilton Electors,…

Donald Trump appeared poised to sew up his victory Monday despite opposition groups’ efforts to block his path by persuading members of the Electoral College to snub him.

The presidency is awarded to the candidate who wins at least 270 votes in the Electoral College, with each state assigned a certain number of votes based on population. Mr. Trump won a majority of the popular vote in enough states to accumulate 306 electoral votes to Hillary Clinton’s 232.

Liberal groups have urged Trump electors to vote for Mrs. Clinton, another candidate or not at all. But Republicans have said they may lose just one pledged elector, giving Mr. Trump more than enough votes to secure the presidency.

The Associated Press reported Thursday that, based on interviews with more than 330 electors of both parties, there was little evidence of a revolt.

“We expect everything to fall in line,” Reince Priebus, Mr. Trump’s incoming chief of staff, said Sunday on Fox News. He added: “Everything is going to be very smooth” on Monday.

Mr. Trump heads toward his Jan. 20 inauguration with nearly seven in 10 American adults—68%—believing he will change the way business is done in Washington, according to a new Wall Street Journal/NBC News poll. But one-third of that group, or about 20% of all adults, believe it will be the wrong kind of change.

Half of Americans said in the poll they approve of how Mr. Trump is handling his transition, while 41% disapprove. That isn’t nearly the honeymoon President Barack Obama enjoyed. At this point in 2008, 73% said they approved of how he was preparing to become president while 13% disapproved.

The survey also found a majority of Americans are significantly bothered by reports of Russian hacking aimed at influencing the election.

Supporters of President-elect Donald Trump cheer him during a rally at Ladd-Peebles Stadium on Saturday in Mobile,...