More than half of Americans do not want the District to become the country’s 51st state, according to a poll released Monday.

The survey, conducted by Gallup from June 19 to June 30 with a sample of more than 1,000 adults, found that 64 percent of participants oppose statehood for D.C., compared to 29 percent in support of the move. The poll revealed that while Democrats are more likely than Independents and Republicans to back statehood, a slim majority of the party – 51 percent – opposes the move.

The poll was released ahead of a House of Representatives hearing on a bill sponsored by D.C.’s nonvoting delegate, Eleanor Holmes Norton, to grant the District statehood. The hearing, originally slated for July 24, was postponed until later this fall to avoid conflicting with former Special Counsel Robert Mueller’s testimony, The Washington Post reported.

Fifteen percent of Republicans and 14 percent of conservatives surveyed in Gallup’s poll support D.C. statehood. The poll found that 39 percent of Democrats and 40 percent of liberals support statehood, while 30 percent of Independents and 35 percent of moderates approve.

“Given Washington’s strong Democratic leanings, making it the 51st state would almost certainly add one voting Democrat to the House and two to the Senate, and that likelihood may underpin Republicans’ reluctance to make it a state,” Gallup reported.

Polls from the past three decades have shown that Americans consistently oppose D.C. statehood, according to Gallup.