A planned Senate Judiciary Committee vote on William Barr’s nomination for attorney general has been delayed a week, as Democrats continue to raise concerns over his oversight of the Mueller investigation. Democrats are concerned about whether Barr will allow Mueller to finish his probe and publicize the results unimpeded. The delay, which is typical for high-profile nominations, is not expected to impede Barr’s chances of being confirmed by the full Senate, but is the latest example of the deep partisan tension surrounding the nomination. Barr has repeatedly refused to give senators any firm guarantee that he will release Mueller’s report to Congress and the public free of redactions, frustrating Democrats. Under rules changes adopted by the Democratic-led Senate in 2013, Barr doesn’t need any Democratic support to be confirmed.