(CNN)Special counsel Robert Mueller’s team has expressed reluctance to him testifying publicly in front of the House Judiciary Committee, according to sources familiar with the matter.

The special counsel’s team has conveyed the notion that Mueller does not want to appear political after staying behind the scenes for two years and not speaking as he conducted his investigation into President Donald Trump. One option is to have him testify behind closed doors. But the notion that Mueller would only answer questions in private has become a sticking point, according to a source, as Democrats believe the public needs to hear directly from the special counsel.

Rank-and-file Democrats made clear Tuesday they believe Mueller must testify publicly given the gravity of the investigation.

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