SAN ANTONIO (AP) – One of the last anti-abortion Democrats in Congress is in the toughest reelection battle of his career in South Texas.

Rep. Henry Cuellar is trying to win the nomination for a 10th term in a primary runoff Tuesday against challenger Jessica Cisneros.

House Speaker Nancy Pelosi and other Democratic leaders are standing by Cuellar despite his staunch anti-abortion views.

Cisneros is an immigration attorney who supports abortion rights.

The runoff is a test of how much abortion rights will energize voters in the midterm elections.

A leaked U.S. Supreme Court draft opinion last month showed that the court may overturn abortion rights this summer.

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