WASHINGTON (Reuters) -Proposed legislation to tighten rules on U.S. lawmakers’ stock holdings and trades should come together later this month, U.S. House of Representatives Speaker Nancy Pelosi told reporters at a news conference on Wednesday. While Pelosi characterized the unfinished legislation as “very strong,” she did not say during a weekly news conference whether congressional staff would be included under its provisions. She gave no details on what the measures will contain. A House vote on the legislation would follow months of committees trying to put together a bill. Lawmakers will …