TREASURIES-Prices gain as Trump roils dollar, raising uncertainty

(Recasts with bond rally, adds Trump comments, quotes, updates

prices)

* Trump's comments on dollar spark safety buying

* Fed begins two-day meeting

* Heavy data week anticipated

By Karen Brettell

NEW YORK, Jan 31 (Reuters) - U.S. Treasury prices gained on

Tuesday as President Donald Trump expressed concern about the

value of the dollar, sending it lower and raising demand for

safe haven U.S. bonds.

In comments targeted to the pharmaceutical industry, Trump

said curre

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