Hillary ClintonHillary Diane Rodham ClintonDemocratic Socialists of America endorses Sanders for president How to end the Electoral College and elect our next president by popular vote CNN town halls put network at center of Dem primary MORE on Monday called 2018 "in many ways" a "dark time for our country" in a New Year's Instagram post.

The former secretary of State added that she is "grateful to everyone who brought light into it," including activists, journalists, election organizers, candidates and protesters.

"I'm grateful to everyone who brought light into it: activists who protected kids at the border, journalists who stood up for truth, organizers who mobilized voters for the 2018 elections, candidates who ran races with grit and inspiration, voters who made their voices heard, and absolutely everyone who marched, donated, called, and protested to fight for the values we share," she wrote.

Clinton also called for "more light in 2019."

"Here's to more light in 2019, and to a shared commitment to make it as bright as possible," she added. "Happy New Year."

The post was accompanied with a photo of Clinton, her husband and former President Bill ClintonWilliam (Bill) Jefferson ClintonJOBS for Success Act would recognize that all people have potential Howard Schultz is holding the Democratic Party hostage Hill-HarrisX poll: 76 percent oppose Trump pardoning former campaign aides MORE and their daughter Chelsea Clinton.