Former President Barack Obama is set to campaign for Vice President Kamala Harris in swing states, starting with Pittsburgh, Pennsylvania, on October 10. This campaign is part of a 27-day effort to boost Harris in key battleground states where she is in a tight race with former President Donald Trump. Obama, a popular figure among Democrats, aims to leverage his influence to mobilize voters, recording advertisements and participating in fundraising efforts. This effort follows Obama's endorsement of Harris after President Joe Biden exited the race, as well as his impactful speech at the Democratic National Convention highlighting Harris's readiness for presidency. The campaign trail marks a significant push by Obama to ensure Democratic success in the upcoming election, reflecting the high stakes perceived by the party. Both Harris and Trump have been focusing heavily on Pennsylvania, a critical state with 19 Electoral College votes, which has seen intense campaigning and narrow polling margins.