Eight Democratic presidential hopefuls took part in the Brown & Black Presidential Forum in Iowa Monday, on Martin Luther King Jr. Day. The forum addresses issues affecting communities of color. Also on Monday, Democratic presidential candidates marched arm in arm through the streets of Columbia, South Carolina, to honor Dr. King.

The show of Democratic Party unity came only one day after, in a highly unusual move, The New York Times announced it was endorsing two Democratic candidates for president: Massachusetts Senator Elizabeth Warren and Minnesota Senator Amy Klobuchar. The Times’s editorial board wrote of their controversial decision, “In this perilous moment, both the radical and the realist models warrant serious consideration.” In 2016, The New York Times endorsed Hillary Clinton for president, who went on to lose the election despite winning the popular vote. Senators Warren and Klobuchar are the last two women senators in the Democratic primary race. Hawaii Congressmember Tulsi Gabbard is also running for the nomination.

In more election news, Washington Congressmember Pramila Jayapal has endorsed Senator Bernie Sanders. Jayapal tweeted, “Bernie has the bold passion, authenticity & clarity that working people across this country desperately need.” Congressmember Jayapal is the co-chair of the Congressional Progressive Caucus along with Wisconsin Congressmember Mark Pocan, who endorsed Sanders for president last Thursday.

Meanwhile, Senator Elizabeth Warren has joined Vermont Senator Bernie Sanders in criticizing former Vice President Joe Biden over his record on Social Security, which includes being willing to raise the retirement age or freeze cost-of-living increases. Sanders has opposed Biden on Social Security since as early as 2010, when Sanders filibustered a Biden-negotiated deal that Sanders said would weaken Social Security.