A little context never hurts...
Only GOP Congressman Supporting Hillary Took Thousands From Planned Parenthood
Planned Parenthood donated thousands of dollars to Hanna’s campaigns in 2012 — when he was one of three Republicans in Congress to accept money from the organization — and in 2014, when he was the only Republican in Congress funded by Planned Parenthood.
So we are not talking some staunch conservative that bolted for the left exit.