President Trump’s public fights with Senate Majority Leader Mitch McConnell (Ky.) and other Republicans are just making it tougher to move his agenda, say GOP aides, strategists and former senators.

Republicans say the hard feelings between the White House and Senate leader will only harden the task of passing tax reform, keeping the government funded and raising the debt ceiling — three top items on the fall agenda.

“It makes it much more difficult obviously. It’s much easier when you got everyone on the same page, in the same boat and pulling in the same direction,” said former Sen. Judd Gregg (R-N.H.), who was a counselor to McConnell when he served in the Senate.

A former Senate Republican leadership aide said Trump is only alienating allies by lashing out at them over Twitter.