JERUSALEM — As Israeli Prime Minister Benjamin Netanyahu seeks reelection, his main concern these days isn’t his political rivals. It’s some of his biggest supporters.

A series of small, pro-Netanyahu parties are competing in the run-up to the Oct. 27 vote . But instead of strengthening the Israeli leader, these parties — including hard-line blocs led by polarizing Cabinet ministers Itamar Ben-Gvir and Bezalel Smotrich — risk weakening his chances for reelection by splitting the vote among Netanyahu’s base.