Republicans and Democrats aiming to pass spending legislation and avoid a government shutdown are still debating increased funding for border security, as well as unrelated measures that could complicate passage, such as taxes.

As for the border, Sen. Richard Shelby, R-Ala., told reporters on Thursday that Republicans and Democrats were about $900 million apart on funding for border security for 2019. But Republicans also wanted advance funding approved for another $2.5 billion in 2020, potentially avoiding another vote tied to Trump’s much-hyped border wall next year.