This is a developing story... Please check back for possible updates...In a show of resistance to the US Supreme Court's dismantling of the Voting Rights Act and Republicans' efforts to redraw congressional districts across southern states in a bid to retain power despite their party's unpopular agenda, labor and voting rights groups were among those that arrived in Montgomery, Alabama Saturday for "Day One" of a mass mobilization against GOP lawmakers who they said are intent on "resurrecting Jim Crow."While groups including the Movement for Black Lives and National Jobs With Justice boarded buses in Atlanta Saturday morning to join more than 250 organizations at a rally at the Alabama State Capitol, other organizers began the "All Roads Lead to the South" National Day of Action with a march across the Edmund Pettus Bridge in Selma, Alabama—the same site of the historic 1965 voting rights march that became known as Bloody Sunday."We started here because we wanted to stand on sacred ground and consecrate ourselves," said organizer LaTosha Brown, co-founder of the group Black Voters Matter. "You cannot fight hate with hate, you have to stand in the spirit of love, and so look around—this is what love looks like."The march and rally were organized in response to a ramp-up of efforts by the Republican Party and right-wing courts, including the far-right majority on the US Supreme Court, to redraw electoral maps in states including Louisiana, Alabama, and Tennessee. The mass mobilization was organized after the Supreme Court handed down its ruling in Louisiana v. Callais last month, effectively eviscerating Section 2 of the Voting Rights Act, which has held that voters of color have the right to legally challenge racially discriminatory congressional maps. The Supreme Court this week allowed Alabama to revert back to an electoral map with just one majority-Black district out of seven, despite that fact that 26% of Alabama residents are Black. Tennessee Republicans also adopted a new electoral map that splits up the state's only majority-Black district, and the Missouri Supreme Court approved a congressional map that targets the state's 5th District, represented by Rep. Emanuel Cleaver.Arriving in Montgomery, Tennessee state Rep. Justin Jones (D-52) said voters across the South need "a united front... to take on this new Confederacy... We know what the intent of these governors and state lawmakers are, to dismantle every gain made during the civil rights movement and dismantle the crown jewel of the civil rights movement, which was the Voting Rights Act.""Our parents and grandparents marched, organized, bled, and won," said organizers ahead of the rally. "The Voting Rights Act was theirs. The fight to keep it is ours. Right now, state by state, that law is being dismantled. We know that we cannot fight the same battles the same way. New times demand new tactics—economic pressure, political organizing, community action, culture, and faith. But we know what we know: Organizing works. And we have unfinished business."At the rally, US Rep. Alexandria Ocasio-Cortez (D-NY) emphasized the need for solidarity from across the US, with supporters of voting rights mobilizing in states near and far from the South—the current center of the GOP's attacks. "They think they can draw us out of power. They do not know the sleeping giant they just awakened," said Ocasio-Cortez. "When Black Americans have the right to vote and that vote is protected, our schools get funded. When voting rights are protected, healthcare gets expanded. When voting rights are protected, our country moves forward. And Montgomery, that's what they're actually afraid of."Erica Smiley, executive director of Jobs With Justice, said labor groups joined the mass mobilization because "the bridges we have to cross are not only in Selma.""Jim Crow didn't just come for the ballot. It came for anyone who tried to organize and have a voice," said Smiley. "Efforts to rollback equality and democracy are happening in the occupied cities, shop floors, and now the halls of the Capitol across the country."Rep. Terri Sewell (D-Ala.) called for the rally to mark the beginning of a "Freedom Summer," with rallies at "every State House" in the country to pressure state legislators to end the GOP gerrymandering efforts, which President Donald Trump has explicitly called for. "Let's declare a Freedom Summer and go to every courthouse this summer, to tell those legislators, 'We will not go back,'" said Sewell.Dozens of satellite events were also taking place across the US on Saturday.