SACRAMENTO (Reuters) - California's Democratic governor signed a law on Wednesday that will allow nurses and midwives to perform some abortions, a move supporters hope will influence the national debate on abortion even as other states are tightening the rules.

Under the law, the nation's most populous state would allow nurse-practitioners, nurse-midwives and physician assistants to perform a procedure known as aspiration, which uses suction to dislodge an embryo from the uterine wall during the first few weeks of pregnancy.

(Reporting by Sharon Bernstein; Writing by Cynthia Johnston; Editing by Dan Whitcomb)