Trump's personal legal team is also pushing for an end to the investigation by September, well before the midterms.

President Donald Trump has accused Mueller's team of trying to influence the critical November elections.

Sen. Chris Coons says special counsel Robert Mueller should not make "major" announcements related to the Russia investigation ahead of the midterm elections.

Former FBI Director Robert Mueller at the US Capitol in Washington, DC on June 21, 2017. Saul Loeb | AFP | Getty Images

Bipartisan lawmakers have sounded the alarm about Russian efforts to meddle in American elections for the last year and a half. Now, Democrats hope to quash Republican fears about potential election influence by another source: special counsel Robert Mueller, the man leading the probe into Russian involvement in the 2016 election and possible collusion with the Trump campaign. On Tuesday, President Donald Trump contended the people working on the "rigged Russia Witch Hunt" will "be meddling with the mid-term elections," especially because Republicans have narrowed the Democratic lead in the generic congressional election ballot.

The president referred to Muller's team as "13 angry Democrats," although Mueller himself is a Republican and was appointed by Trump's own deputy attorney general, Rod Rosenstein, who is also a Republican. Trump tweet: The 13 Angry Democrats (plus people who worked 8 years for Obama) working on the rigged Russia Witch Hunt, will be MEDDLING with the mid-term elections, especially now that Republicans (stay tough!) are taking the lead in Polls. There was no Collusion, except by the Democrats! Trump has repeatedly argued politics motivated the Russia investigation, claiming Democrats want to make up for a loss in the 2016 presidential election. Now, he appears poised to peg potential Republican troubles in November's midterms to the Russia probe. Some Democrats, with their party trying to either take control of Congress or narrow Republican majorities this year, aim to quell accusations of influence on the midterms. On Wednesday, Sen. Chris Coons, D-Del., said it is "important" that the special counsel "avoid any major announcements" ahead of the midterms to avoid affecting races. "And I fully expect him to follow that practice," Coons told CNN on Wednesday.