WASHINGTON (AP) — President Joe Biden on Thursday tied his legislative priorities on voting rights, police reform and climate change to Martin Luther King Jr.'s push for racial justice as he marked the 10th anniversary of the opening of the civil rights leader's memorial on the National Mall.

Biden, introduced by Vice President Kamala Harris, sought to reassure his supporters that he wouldn't let up the fight as he works to muscle his massive social spending bill through a divided Congress. Invoking King, Biden said the country was still working to live up to its ideals as a nation and had reached an inflection point on issues including fighting voting restrictions.

"I know that progress does not come fast enough," Biden said. "It never has."

But he reiterated that protecting the right to vote was "central" to his administration. "I know the stakes. You know the stakes. This is far from over," he said.

Biden spoke at the memorial a day after Senate Republicans blocked debate on Democrats' elections legislation that they tout as a powerful counterweight to new voting restrictions passing in conservative-controlled states. Biden has promised to push for the legislation, but supporters are growing impatient that he has not embraced changing Senate rules to end the filibuster to break through the logjam.

Biden also promised to "continue to fight for real police reform legislation," which has stalled out in Congress after bipartisan talks collapsed this summer.

Highlighting his agenda of social spending, which remains the subject of heated intraparty negotiations, Biden said the bill would cut prescription drug costs, reduce poverty and fight housing discrimination.

"We can afford to do this," Biden said. "We can't afford not to do this."

Biden is hoping to rally Democrats around an agreement on that legislation before he departs for an international climate summit next week.

The memorial was dedicated in the fall of 2011 and is the first honor for an African American on the National Mall. Located on Independence Avenue along the Tidal Basin, the memorial features a huge likeness of King carved out of stone and a separate wall etched with some of his most notable quotes.

Recalling the struggles of King's time, Biden said in his speech that white nationalism still poses a threat to the nation and that, in his view, it inspired the Jan. 6 insurrection at the Capitol. Biden said people of his generation always thought that hate would go away.

"But it doesn't," he said. "It only hides until some seemingly legitimate person breathes some oxygen under the rocks where they're hiding and gives it some breath."

In a reference to former President Donald Trump, Biden said, "We had a president who appealed to the prejudice." He added, "We cannot and must not give hate any safe harbor."

Harris, for her part, praised King as a "prophet" and said the monument "is dedicated to a man who lived among us."

"This monument, whatever your age, is dedicated to a man whose voice we still hear, whose words still echo not only across this city, but throughout our country and our world," she added.