* Two more Republicans oppose Trump's healthcare bills

* Soft U.S. data raises doubts on Fed rate hike plan

* Euro rises above $1.15, Aussie hits 2-year peak

* New Zealand dollar drops after weak local CPI

By Hideyuki Sano

TOKYO, July 18 (Reuters) - The U.S. dollar sank to a 10-month low against a basket of major currencies on Tuesday, hobbled by uncertainty over the pace of the Federal Reserve's policy tightening and worries that President Donald Trump will fail to deliver healthcare reforms.

The dollar's index against a basket of six major currencies sank to a 10-month low of 94.75. From its 14-year peak of 103.82 touched on Jan. 3, it has lost 8.4 percent.

Two more Republican Senators, Jerry Moran and Mike Lee, announced their opposition on Monday to a revised Republican healthcare bill, delivering a serious blow to the legislation.

"If the bills won't pass, there will be no money for tax cuts. The implementation of his fiscal policy will be difficult," said Bart Wakabayashi, Tokyo Branch Manager of State Street.

Friday's weak reading on U.S. inflation and retail sales also fanned speculation that the Fed may not have justification for another rate hike by the end of this year, despite policymakers' projection for such a move.

Money market instruments are now pricing in less than 50 percent chance of a rate increase during the rest of the year.

In contrast, central bank policymakers in the euro zone, the UK and Canada have recently signalled they could adjust their policies, with the Bank of Canada raising rates last week for the first time since 2010.

"A lot of countries are catching up with the U.S. in terms of tightening in monetary policy. So it is natural that the dollar is losing its advantage," said Yukio Ishizuki, senior currency strategist at Daiwa Securities.

The dollar's loss accelerated after the euro rose above a major big number of $1.15.

The common currency rose 0.4 percent to $1.1528, hitting its highest levels since May last year.

The European Central Bank is expected to keep its policy on hold at its rates review on Thursday while many investors expect it to signal a reduction of its stimulus in the following policy meeting in September.

The dollar fell 0.4 percent to 112.30 yen, having lost steam after hitting a near four month high of 114.495 a week ago.

The New Zealand dollar slipped as much as 0.8 percent to $0.7261 after data showed consumer price inflation was flat in the second quarter, below the 0.2 percent expected by analysts in a Reuters poll, and sharply lower from the 1.0 percent posted in the first quarter.