(Adds strategist comment, details, updates prices)
* Canadian dollar at C$1.2676, or 78.89 U.S. cents
* Loonie touches strongest since Aug. 4 at C$1.2588
* Bond prices higher across yield curve
By Alastair Sharp
TORONTO, Aug 17 (Reuters) - The Canadian dollar weakened against its U.S. counterpart on Thursday, as White House drama and an attack in Barcelona reduced investor appetite for the loonie after it hit a nearly two-week high earlier in the day.
A U.S. official said Gary Cohn intends to remain in his post as head of a White House economic council, after speculation earlier in the day of Cohn's possible departure rattled the U.S. stock market and the U.S. dollar. are rushing into the U.S. dollar out of Canada, but they are also rushing out of the U.S. dollar into the euro, gold, Swiss and yen," said Eric Theoret, a currency strategist at Scotiabank.
"The Cohn rumors and this Barcelona episode are adding onto a market that is already tentative," he said, following last week's tensions over North Korea.
Meanwhile, a van mowed through crowds of tourists on Barcelona's most famous promenade, killing about a dozen people in an attack that was claimed by Islamic State. 4 p.m. EDT (1800 GMT), the Canadian dollar CAD=D4 was down 0.4 percent at C$1.2676 per U.S. dollar, or 78.89 U.S. cents.
The loonie had rallied more than 1 percent on Wednesday as U.S. Federal Reserve concerns over inflation and the disbanding of U.S. President Donald Trump's manufacturing council and strategic policy forum weighed on the greenback.
The currency's weakest level of the session was C$1.2647, while it touched its strongest since Aug. 4 at C$1.2588.
Theoret said he expects further Canadian dollar strength heading into a Bank of Canada meeting in October as the market positions for a possible interest rate hike.
Domestic inflation data is due on Friday, with a lower-than-expected print unlikely to weigh on the currency as much as a surprisingly strong number would boost it, Theoret added.
Canadian factory sales were down by 1.8 percent in June from May, with declines for petroleum and coal products, transportation equipment, and chemical industries, Statistics Canada said. Analysts had forecast a decrease of 1.0 percent. government bond prices were higher, with the two-year CA2YT=RR up half a Canadian cent to yield 1.230 percent and the 10-year CA10YT=RR adding 19 Canadian cents to yield 1.849 percent.