WASHINGTON — Times are tough, but don’t worry about most members of Congress making ends meet.

Their collective wealth grew by 13 percent last year, leaving them in better shape than most Americans to make it through an economic downturn, according to a new analysis of personal financial reports.

Overall, nearly two of every three senators are millionaires. That includes presidential candidates Sen. John McCain, R-Ariz., and Sen. Barack Obama, D-Ill. In the House, 39 percent of all members belong to the exclusive club.

Only 1 percent of all Americans are considered millionaires.

“With a median net worth of $746,000, most members of Congress have a comfortable financial cushion to ride out any recession,” said Sheila Krumholz, executive director of the nonpartisan Center for Responsive Politics, which conducted the study.