Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Q: Tensions between Republicans and Democrats over the investigation of Russian involvement in the 2016 presidential election intensified Sunday  with President Donald Trump demanding to know why his campaign is under federal scrutiny while his former opponent Hillary Clinton is not.
Democratic lawmakers mostly stayed out of the Sunday fray after a week in which  Clinton 's 2016 campaign came under fresh scrutiny. The campaign funded political opposition research into Trump that helped create a highly publicized "dossier" on the Republican candidate and fueled some allegations now under scrutiny by Mueller.
It's unclear how much the  Clinton  campaign and Democratic National Committee paid for the opposition research by Fusion GPS  a Washington  D.C.  firm that conducts investigations for private clients. The  Clinton  campaign paid $5.6 million in legal fees to a law firm from June 2015 to December 2016  according to campaign finance records  and the DNC paid the firm $3.6 million in "legal and compliance consulting'' since November 2015. It's impossible to tell from the filings how much of that work was for other legal matters and how much of it related to Fusion GPS.
Trump tweeted Sunday morning that the dossier  which he called " Clinton  made Fake Dossier " could have cost as much as $12 million  although he did not explain how he reached that number.
In April 2016  an attorney representing  Clinton 's presidential campaign and the DNC hired Fusion GPS  which then hired Steele. Brian Fallon  a former spokesman for the  Clinton  campaign  said he learned about Steele and the dossier after the election. People familiar with the matter told The Washington Post that the  Clinton  campaign and the DNC did not direct Steele's activities.
A: 
As Russia case unfolds Trump and Republicans go to battle with Clinton and Democrats