SAN FRANCISCO — President Joe Biden's infrastructure plan could be a sudden lifeline for California's vexing high-speed rail project — if the state can get its own house in order. Biden has given California high-speed rail leaders new hope with his trillion-dollar infusion for infrastructure and a focus on climate change and jobs. That's a marked reversal from former President Donald Trump's attempts to withdraw federal dollars from the project envisioned to run from the San Francisco Bay Area to Southern California. Yet a partisan split in the Central Valley and a dissatisfied group of powerful Los Angeles Democrats could discourage the Biden administration from investing political capital on California's system. Its high costs and political messiness were enough to discourage a House Transportation rail subcommittee from inviting California officials to a high-speed rail hearing this week in a glaring omission.