It's not meaningful to categorize this as 'Far Left-Far Right' by only picking out the views of Sanders and Trump. Just about everyone high-level politician or candidate claims that China manipulates its market (in a way they don't like):

Clinton (2016): "Clinton vows to impose tariffs on China to fight currency manipulation" - http://www.moneycontrol.com/news/rupee/clinton-vows-to-impos...

Kaisch (2016): "If the Chinese are going to be participating and be a part of the market basket, you understand that that means they've got to come clean because they're going to have to let this thing work out. They can't keep manipulating things." - http://www.reuters.com/article/us-china-markets-usa-kasich-i...

Romney (2012): "Mitt Romney has loudly and frequently said on the campaign trail that he would label the People's Republic of China a "currency manipulator"" - http://www.slate.com/blogs/moneybox/2012/10/19/currency_mani... - and "Romney has vowed to declare China a currency manipulator on the first day of his presidency for artificially depressing the value of its currency" - http://news.yahoo.com/rubio-agree-obama-china-currency-issue... .

Rubio (2015): "in order for China to join it, they will have to change their policies on imports, the way they manipulate exports, the currency manipulation, how they steal intellectual property and secrets from our companies." - http://www.realclearpolitics.com/video/2015/08/28/marco_rubi...

Don't forget that "In September of 2010 the House voted on the Currency Reform for Fair Trade Act to address the Chinese manipulation of currency. The bill passed the house 348-79." - http://www.thepoliticalguide.com/Profiles/House/Ohio/Dennis_...