March 20 (Reuters) - The following are the top stories in the Wall Street Journal. Reuters has not verified these stories and does not vouch for their accuracy.

• UBS Group AG agreed to take over its longtime rival Credit Suisse Group for more than $3 billion, pushed into the biggest banking deal in years by regulators eager to halt a dangerous decline in confidence in the global banking system.
• Top Republicans derided the possible indictment of former U.S. President Donald Trump over payoffs to a porn star as politically motivated, while Democrats warned that the former president's social-media exhortations were irresponsible and risked new violence akin to the Capitol riot.
• U.S. Senator Elizabeth Warren on Sunday called for an independent investigation into the recent failures of two U.S. regional banks, Silicon Valley Bank and Signature Bank.
• A New York defense attorney, who briefly advised Donald Trump's former lawyer Michael Cohen, is expected to testify on Monday before the Manhattan grand jury investigating Donald Trump's alleged role in a hush-money payment to a porn star, according to people familiar with the matter.