Masood said the partnership is essential to counter the BJP's dominance in UP. He pointed to Rahul Gandhi's leadership as the only viable way to challenge the BJP across the state.
The call follows remarks from SP MP Iqra Hasan, who claimed only the party could defeat the BJP, prompting Masood to demand a union.
Masood warned that Congress has already begun preparations to field candidates independently if the alliance stalls. The party has opened a slate of potential candidates for the 403-seat assembly.
A recent SP executive meeting saw Akhilesh Yadav pledge to boost 27,000 votes per seat, underscoring the scale of the contest.
The SP's decision will likely come before the next party meeting, with Congress ready to launch its own campaign by early 2027.