"The TSEA would not necessarily have to pass Congress to have the desired effect," said Alexander Huang, a cross-strait specialist with the Washington-based think tank, the Brookings Institute.
Huang said support in Congress has had the effect of reminding the administration it should improve its implementation of the TRA.
Other analysts said Taiwan's hands may be tied in pushing for the TSEA.
"Congress has its own agenda in pushing for the TSEA," Goldstein said.
"They want more of a say in determining US arms sales and the bill is also a good bargaining chip to use," he said.
"Maybe the Taiwan lobby was told to stay out of it and just let members of Congress do their job," Goldstein added.
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