evidence: Former President Donald Trump is doubling down on his vow to repeal Obamacare if he wins the White House again, even though an increasing number of Americans have embraced the landmark health reform law in recent years. [...] A record number of people are signing up for Obamacare policies and the law enjoys much higher favorability ratings among the public than it ever has. But although it has been a politically losing issue for Republicans in recent elections, Trump has revived his quest to kill Obamacare during his latest bid for the GOP nomination. It began in November, when he posted on his Truth Social site that Republicans should "never give up" trying to terminate the law and that he would replace it with "MUCH BETTER HEALTHCARE." [...] The nearly 14-year-old law is even more embedded in the nation’s health care system than it was when Trump took office, vowing to eradicate Obamacare. But he and the Republican lawmakers who controlled Congress ultimately failed to repeal and replace the Affordable Care Act after months of unsuccessful attempts to come up with an alternative.