May 10 (Reuters) - Republican vulnerabilities on abortion policy are on display in Ohio, with the party playing defense against a surge in abortion rights activism that could help President Joe Biden and his Democratic Party in next year's elections. Abortion rights advocates have racked up electoral victories, lifting Democrats along the way, since the Supreme Court struck down the national right to abortion last year. Ohio Republicans passed a six-week state abortion ban in 2019, but that law is blocked while litigation proceeds. In Republican-leaning Kentucky, abortion rights activists are already knocking on doors ahead of November's gubernatorial election, when Democrat Andy Beshear is seeking another term. Senate President Matt Huffman has made clear the measure is aimed at the abortion rights amendment.

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